Musnad Ahmad 1178:2

Yahya ibn Ghaylan narrated to us, he said: Rishdin narrated to us, he said: Zabban narrated to me, from Sahl ibn Mu'adh, from his father, that he heard Umm al-Darda' saying: I came out of the bathhouse, and the Messenger of Allah (peace and blessings of Allah be upon him) met me, and he mentioned it.