Musnad Abu Ya'la al-Mawsili 132:1

Ishaq ibn Abi Isra'il narrated to us, Ali ibn Qadim narrated to us, Sharik narrated to us, from Ubayd al-Maktab, from al-Sha'bi, from Anas ibn Malik, who said: The Messenger of Allah (may Allah bless him and grant him peace) laughed one day, or smiled, and said to his companions: "Will you not ask me what I laughed at?" They said: "O Messenger of Allah, what did you laugh at?" He said: "I marveled at the servant’s arguing with his Lord on the Day of Resurrection. He says: 'O my Lord, did You not promise me that You would not wrong me?' He says: 'Yes.' He says: 'Then I will not accept any witness against me except from myself.' He says: 'Is it not sufficient as a witness that I, and the noble recording angels, are [witnesses]?'" He said: "He repeats the words several times." He said: "Then his mouth will be sealed, and his limbs will speak of what he used to do." He said: "Then he will say: 'Away with you and be cast far away! It was on your behalf that I was arguing.'"