Musnad Abu Ya'la al-Mawsili 152:207

'Abdullah bin 'Umar narrated to us, Husayn bin 'Ali narrated to us, from Za'idah, from Layth, from Muhammad bin 'Abdur-Rahman bin Yazid, from his father, from 'Abdullah, who said: The Messenger of Allah (ﷺ) went for his need and said: "Bring me something with which I may cleanse myself (istinja), and do not bring me a bone or dung." He said: So I brought him water for ablution, and he performed ablution, then he prayed.