What is the ruling on the marriage of the sons of a brother who was nursed by his sister, to her daughters, and likewise, the sons of brothers who were not nursed by her, to her daughters?
Source: FtawySummary from Ftawy's records · added here Sep 2, 2026
If a brother is suckled by his sister five full, satisfying times within the two-year suckling period, he becomes her son through suckling. It then becomes forbidden for his sons to marry the daughters of this woman, because those daughters have become paternal aunts to those sons through suckling, based on the Prophet's (peace and blessings be upon him) saying: "What is forbidden by lineage is also forbidden by suckling." As for the sons of brothers who were not suckled by her, it is permissible for them to marry her daughters.
Summary from Ftawy's records · added here
Reviewed by El Fatwa's sharia committee.
Read the full answer on Ftawyhttps://ftawy.com/en/questions/55633
Where this answer came from
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- Ftawy
- Original fatwa ID
- 55633
- 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