hadith

 Sahih Bukhari  صحیح بخاری

Hadith # 2660

Translation:

Narrated Uqba bin Al-Harith (RA): 

I married a woman and later on a woman came and said, "I suckled you both." So, I went to the Prophet ﷺ (to ask him about it). He said, "How can you (keep her as a wife) when it has been said (that you were foster brother and sister)? Leave (divorce) her.