Is it permissible for Muhsin and Ahmad – the brothers of Jamilah, who was nursed with Ali and Abd al-Qadir – to marry Tadi and Hanouf – the daughters of Ali and Abd al-Qadir?

Ahmad and Muhsin are not permitted to marry Ali's and Abdul-Qadir's daughters (Tadhi and Hanouf), because everyone (Ahmad, Muhsin, Ali, and Abdul-Qadir) nursed from the same woman, becoming brothers through suckling. Each of them thus became an uncle through suckling to the children and daughters of the others. The Prophet, peace and blessings be upon him, said: "Indeed, suckling prohibits what birth prohibits," and in An-Nasa'i's wording: "What is prohibited by lineage is prohibited by suckling."