Abu Atiyyah (may Allah have mercy on him) said that his brother died, and his nursing child was there. Abu Atiyyah (may Allah have mercy on him) said to his wife: Nurse him. She said: I fear that you will make me pregnant. So Abu Atiyyah (may Allah have mercy on him) swore that as long as she nursed him, he would not come near her. She did so until she weaned him. He said: I mentioned this to Sayyiduna Ali (may Allah be pleased with him), and he said: You intended good, and ila only happens in a state of anger.
(b) Abu Atiyyah (may Allah have mercy on him) said that he married his brother's wife, and she was nursing his nephew.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الإيلاء / 15240