Musnad Ahmad 5:493

Waki’ narrated to us, from Shu’bah, from ‘Amr ibn Murrah, from ‘Abdullah ibn Salamah, from ‘Ali, who said: I was suffering from an ailment, so the Prophet (ﷺ) came to me while I was saying: "O Allah, if my time has come, then grant me rest; and if it is delayed, then heal me—or grant me well-being—and if it is a trial, then grant me patience." The Prophet (ﷺ) said: "What did you say?" He said: So I repeated it to him. He said: Then he wiped [me] with his hand and said: "O Allah, heal him—or grant him well-being." He said: So I did not suffer from that pain of mine after that.