Silsilah as-Sahihah 3077 — Post-Prayer Remembrances

An Ansari (may Allah be pleased with him) says that I heard the Messenger of Allah (peace and blessings be upon him) recite this supplication a hundred times at the end of the prayer (or after it): "O Allah! Forgive me, accept my repentance, indeed You are the Acceptor of repentance, the Most Forgiving."