Musannaf Ibn Abi Shaybah 31724 — What they said: supplication reaches

Sayyiduna Abu Hurayrah (may Allah be pleased with him) said that the Prophet (peace and blessings be upon him) said: "Indeed, a man's rank in Paradise is raised, and he says: 'My Lord, how was this rank given to me?' It is said: 'It was given through your son's seeking forgiveness.'"