2.4 The Wet-nurses Now they waited for the wet-nurses to come down from the mountains for the air of Mecca, cooped up in the middle of rocky mountains, was considered unhealthy for babies. It was the custom of Arab ladies of noble birth to give their babies to wet-nurses who lived in the invigorating desert air. Some of these tribes who lived in the desert were famous as wet-nurses, among them Banu Saad. While waiting for their arrival, Amina gave the baby to Thuwayba, a slave of Abu Jahl, Mohamed's kinsman, to nurse. She nursed him only a few days, but he was very good to her all her life, and when she died, he asked about her son who had passed away before her. The wet-nurses came; they were from Banu Saad and they selected the babies who had fathers and passed by the fatherless for they counted on being noticed and generously rewarded by the fathers. Mohamed was left without a wet-nurse, but just as the tribe was about to leave, Halima, the daughter of Abu Dhuayb said to her husband, "I hate to return with my companions without a child. I shall go and take that fatherless infant." "Yes, do so," said her husband, "perhaps Allah will cause him to be a blessing for us." Halima had not been given an infant at first because she was less well off than the rest. She relates that after she took Mohamed everything seemed to prosper. Her goats increased in number and yielded more milk, her chickens grew fat and increased, and people used to tell their shepherds, "See where Halima 's sheep graze and let our sheep graze in the same pasture."