Musnad Abu Ya'la al-Mawsili 148:56

Abu Bakr ibn Abi Shaybah narrated to us, Sharik narrated to us, from Abdullah ibn Isa, from Abdullah ibn Jabr, from Anas, who said: There was a young Jewish man who used to serve the Prophet, may Allah bless him and grant him peace. He became ill, so the Prophet, may Allah bless him and grant him peace, came to visit him. He said, "Testify that there is no god but Allah and that I am the Messenger of Allah." He began to look at his father, so he said to him, "Say what Muhammad says to you." So he said it, then he died. The Prophet, may Allah bless him and grant him peace, said to his companions, "Pray over your companion."