2 – The ḥadith affirms the tangible reality that physical traits are passed on through hereditary factors, which account for the resemblance of offspring to their parents in every species—plants, animals, and human beings alike.

3 – It also shows that outwardly established legal rulings take precedence over circumstantial clues; such clues are resorted to only when the primary legal principles on which verdicts are built are absent.

4 – The Prophet’s statement, “Had it not been for what has already been laid down in the Book of Allah, I would have dealt with her differently,” proves that an earlier ruling is not revoked unless it contradicts an explicit text of the Quran, the Sunnah, or the unanimous consensus of the Muslim community.

5 – The better course is caution whenever a doubt arises that might conflict with a legal principle. Thus Saʿd ibn Abī Waqqāṣ and ʿAbd ibn Zamʿa once disputed over a child born on the bed of the latter’s father. Saʿd claimed the child for his brother ʿUtbah ibn Abī Waqqāṣ, yet the Prophet ﷺ awarded the child to ʿAbd ibn Zamʿa because he had been born on his father’s bed. In the two Ṣaḥīḥs the Prophet ﷺ said, “He is your brother, ʿAbd ibn Zamʿa,” on the strength of that presumption. Still, seeing a strong likeness between the boy and ʿUtbah, he instructed his wife Sawdah bint Zamʿa to veil herself from the child. ʿĀʾishah (may Allah be pleased with her) relates: “She never saw him again until she met Allah, Exalted is He.”

6 – The report validates the testimony of experts in resemblance (qāfa) and the lineages they confirm—unless their findings collide with a foundational principle. Circumstantial indicators do not overrule fixed legal foundations, foremost among them the presumption attached to the marital bed. The Lawgiver has granted the bed’s owner a decisive claim: every child born upon it is attributed to him. No degree of resemblance, blood-type match, or similar evidence—which all admit several possibilities—can take precedence over that presumption.