What supplication did Umar ibn al-Khattab use when leveling the grave?

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Umar ibn al-Khattab, may Allah be pleased with him, used to supplicate when leveling the soil over the deceased saying: 'O Allah, the family, wealth, and kin have delivered him to You, and his sin is great, so forgive him.' This narration is recorded by Ibn al-Mundhir.