Is it permissible for a sister to breastfeed her brother when their mother is ill, and what is the Shar'i (Islamic legal) evidence for that?
Source: FtawySummary from Ftawy's records · added here Sep 2, 2026
Yes, it is permissible for a sister to nurse her brother. Consequently, he becomes a son to her and to her husband who caused the milk to be produced. Based on this, it becomes forbidden for him to marry the daughters of this man, or his sisters, or his maternal aunts, or his paternal aunts. This is based on the Almighty's saying: "Forbidden to you are your mothers, and your daughters" [An-Nisa: 23], and the Prophet (peace be upon him) said: "What is forbidden by lineage is also 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/30204
Where this answer came from
- Source platform
- Ftawy
- Original fatwa ID
- 30204
- 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