Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) went to a ruin belonging to Banu Najjar to relieve himself. He returned in a state of anxiety and was saying: "If I did not fear that you would stop burying (your dead), I would have prayed to Allah that He make you hear what I have been made to hear regarding the punishment of the graves."