Is it permissible for the sons of a brother to marry the daughter of a sister who was breastfed by their mother (her grandmother) for nine months?
Source: FtawySummary from Ftawy's records · added here Sep 2, 2026
If the suckling occurred within the two years [of infancy], then it is not permissible for your brothers' children to marry your brother's daughter, because she has become their sister through suckling, and consequently, an aunt to their children through suckling. The proof for this is the Prophet's (peace and blessings be upon him) saying: "What is forbidden by lineage is forbidden 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/40713
Where this answer came from
- Source platform
- Ftawy
- Original fatwa ID
- 40713
- 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