Musnad Ahmad 1153:259

Yahya narrated to us, from Yahya ibn Sa’id, who said: ‘Amrah narrated to me, she said: I heard ‘Aishah say: A Jewish woman came to me asking me, and she said: "May Allah protect you from the punishment of the grave." When the Prophet (peace and blessings of Allah be upon him) came, I said: "O Messenger of Allah, are we punished in the graves?" He said: "I seek refuge in Allah [from that]." Then he mounted a mount, and the sun eclipsed. He went out, and I was between the stone enclosures with the women. The Prophet (peace and blessings of Allah be upon him) came from his mount and went to his place of prayer, and the people prayed behind him. He stood and prolonged the standing, then he bowed and prolonged the bowing, then he raised his head and prolonged the standing, then he bowed and prolonged the bowing, then he raised his head and prolonged the standing, then he prostrated and prolonged the prostration. Then he stood up, [doing so] more briefly than his first standing, then he bowed, [doing so] more briefly than his first bowing, then he stood up, [doing so] more briefly than his first standing, then he bowed, [doing so] more briefly than his first bowing, then he prostrated, [doing so] more briefly than his first prostration. Thus, there were four bowings and four prostrations. The sun cleared, and he said: "You are being tested in the graves like the trial of the Dajjal." She said: And I heard him after that seeking refuge in Allah from the punishment of the grave.