Musannaf Ibn Abi Shaybah

Hazrat Yahya bin Abdur Rahman bin Hatib narrates from his father that we were sitting with Hazrat Ka'b bin Ahbar (may Allah have mercy on him) in the mosque, and he was relating hadith. Hazrat Umar (may Allah be pleased with him) arrived and sat at the edge of the gathering, then called him and said, "O Ka'b, May you perish, today you have frightened us." Hazrat Ka'b replied, "By the One in Whose hand is my soul, on the Day of Resurrection the Fire will be brought near, and there will be wailing because of it, until when it comes near, it will take a breath, and due to its awe/fear all the Prophets, the truthful, and the martyrs will fall to their knees. Then every Prophet, truthful one, and martyr will say: 'O Allah, today I ask You only about myself.' And O son of Khattab! Even if you had the deeds like the Prophets, still you would fear that you might not be saved." Hazrat Umar (may Allah be pleased with him) said: "By God, the matter is indeed very grave/difficult."