Reports on deepening the grave

Abu al-Ala said: Sayyiduna Abu Musa (may Allah be pleased with him) left instructions concerning the digging of his grave, that the grave be dug deep.

Something similar is reported from al-Dahhak bin Abd al-Rahman.

Al-Hasan and Muhammad (Ibn Sirin) used to like that the grave be deep.

Hisham narrates that al-Hasan and Muhammad (Ibn Sirin) used to say: The grave should be dug deep.

Ibrahim said: The grave should be dug up to the navel.

Al-Hasan said: Sayyiduna Umar (may Allah be pleased with him) left instructions that the depth of his grave be a man's height plus the reach of a raised arm.