Musnad Abu Ya'la al-Mawsili 108:170

Abu Bakr narrated to us, Isa bin Yunus narrated to us, from Abdullah bin Muslim, from Abd al-Rahman bin Sabit, from Jabir, who said: I said, "O Messenger of Allah, how did you wake up?" He said, "In the best state of a man who did not wake up fasting and did not visit a sick person."