Musnad Ahmad 30:526

'Abd al-Razzaq narrated to us, Ma'mar informed us, from al-Zuhri, from Ibn al-Musayyib, that Hassan said in a circle in which Abu Hurayrah was present: "I adjure you by Allah, O Abu Hurayrah, did you hear the Messenger of Allah, may Allah bless him and grant him peace, say: 'Defend me, may Allah support you with the Holy Spirit'?" He said: "O Allah, yes."