Silsilat al-Ahadith al-Sahihah

Sayyiduna Abu Sa‘id Khudri (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: “Whoever performs ablution and says: ‘You are Pure, O Allah! With Your praise. There is no deity worthy of worship except You. I seek Your forgiveness and turn to You.’ — then these words are written on a paper and sealed, and it will not be torn until the Day of Resurrection.”