Musnad Abu Ya'la al-Mawsili 252:17

'Abd al-A'la ibn Hammad al-Narsi narrated to us, Mu'tamir narrated to us, he said: I heard 'Uqbah ibn Muhammad al-Madini narrating from 'Abd al-Rahman ibn Zayd ibn Aslam, from Abu Hazim, from Sahl ibn Sa'd, who attributed the hadith to the Prophet (may Allah bless him and grant him peace), he said: "With Allah are treasuries for good and evil, their keys are men. So glad tidings to him whom He has made a key for good and a lock for evil. And woe to him whom He has made a lock for good and a key for evil."