It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with him), he says: One day we went with the Messenger of Allah (peace and blessings be upon him) to Sayyiduna Sa’d (may Allah be pleased with him) on the occasion of his death. When the Messenger of Allah (peace and blessings be upon him) performed his funeral prayer and he was placed in the grave and the earth was leveled over him, the Messenger of Allah (peace and blessings be upon him) glorified Allah, and we also glorified Allah with him for quite a while. Then he (peace and blessings be upon him) said Allahu Akbar, and we also said Allahu Akbar with him. Someone asked: O Messenger of Allah! What was the reason for your saying Subhan Allah and Allahu Akbar? He (peace and blessings be upon him) said: The grave had become constricted for this righteous servant until Allah Almighty made it spacious for him.