A man came to Abu Musa (may Allah be pleased with him) and said: My wife's milk became blocked in her breast, so I kept sucking it and spitting it out, and some of it went into my stomach. He said: "She has become unlawful for you." So the man went to Abdullah (bin Mas'ud) (may Allah be pleased with him). Abu Atiyyah says: He got up and we got up with him, and he said: "Drink the milk of her breast! Suckling (that counts) is only that which grows flesh and makes blood." At this Abu Musa (may Allah be pleased with him) said: "As long as this scholar is among you, do not ask me about anything."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8467