Is it permissible for the son of the brother by fosterage to marry the daughter of his sister by fosterage, who was suckled by his father’s wife?
Source: FtawySummary from Ftawy's records · added here Sep 2, 2026
Your sister's suckling from the man makes him her foster brother, due to the Prophet's (peace be upon him) saying: "What is forbidden by lineage is forbidden by fosterage." As for you and your siblings, you have no relation to the man, and it is permissible for him to marry your daughter, unless your grandmother also nursed him.
Summary from Ftawy's records · added here
Reviewed by El Fatwa's sharia committee.
Read the full answer on Ftawyhttps://ftawy.com/en/questions/59506
Where this answer came from
- Source platform
- Ftawy
- Original fatwa ID
- 59506
- Added here
- . This is when the answer was added to El Fatwa, not the fatwa's date.
- Text
- Summary from Ftawy's records, reviewed by El Fatwa's sharia committee.
- Read the full ruling
- Read the full answer on Ftawy