Is it permissible to marry the sister of a foster brother if she was not nursed by the same mother?
Source: FtawySummary from Ftawy's records · added here Sep 2, 2026
If a woman breastfeeds you five full feedings within the first two years of your life, she becomes your mother by suckling (رضاعة), and all her children, both sons and daughters, become your siblings by suckling, whether they were breastfed with you or not. This is based on the Almighty's saying: "{and your sisters by suckling}" [Qur'an 4:23]. Therefore, it is not permissible for you to marry this girl because she is your sister by suckling.
Summary from Ftawy's records · added here
Reviewed by El Fatwa's sharia committee.
Read the full answer on Ftawyhttps://ftawy.com/en/questions/46366
Where this answer came from
- Source platform
- Ftawy
- Original fatwa ID
- 46366
- 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