Musnad Ahmad 1272:2

Sufyan narrated to us, from Ibn ‘Ajlan, from Sa‘id, from Abu Murrah, the freed slave of ‘Aqil, from Umm Hani, who said: I came to the Messenger of Allah (peace and blessings of Allah be upon him) while he was at the upper part of Makkah, but I did not find him, and I found Fatimah. Then the Messenger of Allah (peace and blessings of Allah be upon him) came, and upon him were traces of dust. I said: "O Messenger of Allah, I have granted protection to two in-laws of mine, and the son of my mother claims that he will kill them." He said: "We have granted protection to whom you have granted protection." Water for washing was placed for him in a large bowl, and I saw the traces of dough in it. He performed ablution—or he said: he performed a full washing, I am in doubt—and he prayed the dawn prayer in a garment, wrapping himself in it.