If a man mistakenly cohabits with his brother's intended bride (due to misidentification at the wedding), and she conceives, to whom does the child belong?
General Chapter
Al-Mughni
Book of Mutual Imprecation (Li'an)
Primary text
The child belongs to the man who performed the intercourse because it was an act where the man believed the act to be lawful, thus the lineage follows the act, similar to intercourse in a void marriage.
Supporting text
Abu Bakr argues that the child belongs to the husband, adhering to the principle that the child belongs to the bed (*al-walad lil-firash*).