Fiqh-us-Sunnah Volume 1, Purification and Prayer, Fiqh 1.064.

Section : The reason for its legitimacy.

Said ‘Aishah, “We went out with the Messenger of Allah on one of his journeys until we reached Baida’. At this place, one of my bracelets broke and fell somewhere. The Messenger of Allah and others began to look for it. There was no water at that place, nor did anyone have any water with him. The people went to Abu Bakr and said, “Do you see what your daughter has done?” Abu Bakr came to me, while the Prophet was sleeping on my thigh. He blamed me and said to me whatever Allah willed him to say. He also poked me in my side. I could not move, for the Prophet, upon whom be peace, was sleeping on my lap. He slept until the morning without any water available. Then, Allah revealed the verse of tayammum. As-Sayyid ibn Huzhain said, ‘That was not the first blessing from the family of Abu Bakr.’ The camel that I was on got up and we found the necklace underneath it.” (Related by “the group,” except for at-Tirmizhi.)