Musnad Abu Ya'la al-Mawsili 42:371

Zuhayr narrated to us, Abdullah bin Maslamah bin Qa'nab narrated to us, Sulayman bin Bilal narrated to us, from Abdullah bin Abd al-Rahman, from Nahar al-'Abdi, that he heard Abu Sa'id al-Khudri mentioning that the Messenger of Allah (may Allah bless him and grant him peace) said: "Indeed, Allah will ask the servant on the Day of Resurrection until He says: 'What prevented you, when you saw the evil, from denouncing it?' Then, when Allah prompts His servant with his argument, he will say: 'My Lord, I trusted in You and I feared the people.'"