Sayyiduna Abu Musa al-Ash'ari (may Allah be pleased with him) said: "Listen! Two safeguards came down from the heaven. One of them has passed, and that is the Messenger of Allah (peace and blessings be upon him); and the other is seeking forgiveness (istighfar)."
Imam al-Tabarani (may Allah have mercy on him) said: "Umar Kisra did not narrate any hadith with a connected chain other than this one, and no one narrated it except Ibn Ulayyah."