´Aishah narrated:` “My uncle through suckling came and asked permission (to enter) but I refused to admit him until I asked the Messenger of Allah. So the Messenger of Allah said: “Let him in since he is your uncle.’” She said: “It is only the woman who suckled me; I was not suckled by the man.’ So he said: ‘Indeed he is your uncle, so let him in.’”
´Amr bin Ash-Shariq narrated that Ibn Abbas was asked about the case in which a man had two slave girls, one of them suckled a girl and the other suckled a boy, is it lawful for the boy to marry the girl? She said:` “No, the semen is the same.”
Hadith Referenceسنن ترمذي / كتاب الرضاع / 1149
Hadith Gradingالألبانی:صحيح الإسناد | زبیر علی زئی:(1149) إسناده ضعيف, ابن شھاب الزھري مدلس و عنعن (تقدم:440)