To what extent does Islam identify credit for lineage?

Sources

• ✓ 33:5 · Al-Ahzaab

  33:5 · Muhammad Marmaduke Pickthall

  ٱدْعُوهُمْ لِءَابَآئِهِمْ هُوَ أَقْسَطُ عِندَ ٱللَّهِ ۚ فَإِن لَّمْ تَعْلَمُوٓا۟ ءَابَآءَهُمْ فَإِخْوَٰنُكُمْ فِى ٱلدِّينِ وَمَوَٰلِيكُمْ ۚ وَلَيْسَ عَلَيْكُمْ جُنَاحٌۭ فِيمَآ أَخْطَأْتُم بِهِۦ وَلَٰكِن مَّا تَعَمَّدَتْ قُلُوبُكُمْ ۚ وَكَانَ ٱللَّهُ غَفُورًۭا رَّحِيمًا

  Proclaim their real parentage. That will be more equitable in the sight of Allah. And if ye know not their fathers, then (they are) your brethren in the faith, and your clients. And there is no sin for you in the mistakes that ye make unintentionally, but what your hearts purpose (that will be a sin for you). Allah is ever Forgiving, Merciful.

• ✓ 4:176 · An-Nisaa

  4:176 · Muhammad Marmaduke Pickthall

  يَسْتَفْتُونَكَ قُلِ ٱللَّهُ يُفْتِيكُمْ فِى ٱلْكَلَٰلَةِ ۚ إِنِ ٱمْرُؤٌا۟ هَلَكَ لَيْسَ لَهُۥ وَلَدٌۭ وَلَهُۥٓ أُخْتٌۭ فَلَهَا نِصْفُ مَا تَرَكَ ۚ وَهُوَ يَرِثُهَآ إِن لَّمْ يَكُن لَّهَا وَلَدٌۭ ۚ فَإِن كَانَتَا ٱثْنَتَيْنِ فَلَهُمَا ٱلثُّلُثَانِ مِمَّا تَرَكَ ۚ وَإِن كَانُوٓا۟ إِخْوَةًۭ رِّجَالًۭا وَنِسَآءًۭ فَلِلذَّكَرِ مِثْلُ حَظِّ ٱلْأُنثَيَيْنِ ۗ يُبَيِّنُ ٱللَّهُ لَكُمْ أَن تَضِلُّوا۟ ۗ وَٱللَّهُ بِكُلِّ شَىْءٍ عَلِيمٌۢ

  They ask thee for a pronouncement. Say: Allah hath pronounced for you concerning distant kindred. If a man die childless and he have a sister, hers is half the heritage, and he would have inherited from her had she died childless. And if there be two sisters, then theirs are two-thirds of the heritage, and if they be brethren, men and women, unto the male is the equivalent of the share of two females. Allah expoundeth unto you, so that ye err not. Allah is Knower of all things.

• ✓ Tafsir Ibn Kathir on 33:5

  Sunni

  Tafsir Ibn Kathir · 33:5

  This verse opens by clarifying a tangible, well-known reality to explain a more subtle, intended meaning: just as no human being has two hearts within their chest, and just as a woman who becomes a 'mother' through the declaration of 'zihar' is not truly their mother in reality, similarly, an adopted son is not genuinely the son of the man who adopts him, even if he calls him so. Allah declares: "Allah has not made for any man two hearts within his interior, nor has He made your wives whom you declare as mothers through zihar to be your real mothers." This is akin to His statement elsewhere that only a woman who actually gives birth to a child is that child's mother, and that denying this is a clear falsehood. Regarding the phrase "and has not made your adopted sons your real sons," this is the main derision: Allah specifically revealed this in regard to Zayd ibn Harithah, the freed slave of the Prophet Muhammad ﷺ, whom the Prophet adopted before his prophethood and was called “Zayd ibn Muhammad.” Allah intended to sever this familial relation by commanding that adopted children not be considered biological children. This is reflected in the broader Quranic statement: "Muhammad is not the father of any of your men, but he is the Messenger of Allah and the Seal of the Prophets. And Allah is, of all things, Knowing." The adoption relation is only nominal and does not equate to biological parenthood, because the child is born from another man's lineage—just as a person cannot have two hearts. Allah's statement "He speaks the truth and guides the way" means He speaks justly and appropriately, guiding to the straight path, as explained by noted scholars. Some narrations relate that this verse was revealed concerning a man from Quraysh nicknamed "Two-Hearted" who claimed to possess two minds; Allah revealed this as a response. Imam Ahmad narrated from Ibn Abbas an event where the Prophet ﷺ once entered prayer, and hypocrites mocked saying he had two hearts—one with the worshippers and one elsewhere. Allah revealed this verse to counter that notion. The narration of Zayd ibn Haritha's story corroborates this: before revelation, he was called by the Prophet's name, but after the verse, people were commanded to call him by his true lineage, not as the Prophet's biological son. The command to "call them by their fathers" abrogates the earlier practice where adopting a slave or freedman as a son was allowed and common practice. Allah ordered that genealogical attribution be restored to the biological fathers, as this is the just and fair approach. Narrations from the companions report that prior to this ruling, Zayd was called "Zayd ibn Muhammad," but after the revelation, the name reverted to "Zayd ibn Harithah." Despite the annulment of adopted lineage, the social and familial treatment of an adopted son remained similar to a biological son in many respects, such as in seclusion and relationships of shariah-mandated prohibitions. A notable example is the Prophet's marriage to Zaynab bint Jahsh, who was once the wife of Zayd, illustrating that the adopted son's wife did not become the Prophet’s wife’s mother, since adoption does not create true lineage. Moreover, breastfeeding relationships lawful as prohibitions of marriage correspond to blood relations, meaning that a child fostered by breastfeeding is treated like a biological child regarding prohibitions. Calling someone a son out of kindness or respect is not prohibited, provided it is not a claim to actual biological parenthood. Further, this verse states: "But if you do not know their fathers, then they are your brothers in religion and your clients (freedmen)." This means that if the real father is unknown, the adopted child is to be regarded as a brother in faith and social clientage, forming a substitute bond compensating for the absence of true lineage. An example comes from an incident when the Prophet was migrating and a dispute arose about the guardianship of his relative's daughter. Ali, Zayd, and Ja'far each claimed care for her, and the Prophet resolved the dispute by affirming kinship through religious and social bonds, affirming that in the absence of true parentage, the bond of religion and clientage apply. Ibn Jarir narrates from Abu Bakrah who, recalling this verse, identified himself as someone whose father was unknown but asserted his fraternity in religion. There is a strong warning against knowingly claiming lineage falsely; such an act is considered kufr (disbelief). Therefore, the command is to call adopted children by their biological fathers to avoid this major transgression. The verse continues with the statement that if errors occur unintentionally in assigning lineage despite earnest effort, there is no blame—in these mistakes Allah removes the hardship and the sin. The Messenger said that Allah has forgiven his nation for mistakes and forgetfulness, and that an earnest judge who errs still receives reward. However, deliberate falsehood in lineage entails sin and contravenes Allah’s law. The famous hadith emphasizes the gravity of falsely claiming a child to be one’s own who is not. Eventually, this ruling replaced earlier pre-Islamic and early Islamic customs, showing the gradual clarification and perfection of shariah rulings. The verse concludes by stating Allah is Oft-Forgiving and Most Merciful, highlighting that forgiveness covers unintentional mistakes, but persistent, intentional wrongdoing incurs divine displeasure. This comprehensive commentary elucidates the meaning of the verse, its historical backdrop, and its profound legal and social implications regarding adoption, lineage, and the treatment of adopted children in Islam.

• ✓ Sahih al-Bukhari 61:18

  Sunni SAHIH

  Sahih al-Bukhari · Book 61, Hadith 18 · Narrated by Abu Dhar

  The Prophet (peace be upon him) said: No man claims a lineage other than his father's while knowing it, except he is a disbeliever. And whoever claims a people to whom he does not belong, let him prepare his place in the Fire.