Narrated to me Abu al-Tahir Ahmad ibn 'Amr ibn 'Abdullah ibn 'Amr ibn Sarh and Harmalah ibn Yahya al-Tujibi, both said: Ibn Wahb informed us, from Yunus, from Ibn Shihab, that 'Ata' ibn Yazid al-Laythi informed him that Humran, the freed slave of 'Uthman, informed him that 'Uthman ibn 'Affan — may Allah be pleased with him — called for water for ablution and performed ablution: he washed his hands three times, then rinsed his mouth and sniffed water into his nose and blew it out, then washed his face three times, then washed his right arm up to the elbow three times, then washed his left arm likewise, then wiped his head, then washed his right foot up to the ankles three times, then washed his left foot likewise. Then he said: "I saw the Messenger of Allah, peace and blessings be upon him, perform ablution like this ablution of mine." Then the Messenger of Allah, peace and blessings be upon him, said: "Whoever performs ablution like this ablution of mine, then stands and prays two rak'ahs without letting his mind wander in them, his previous sins will be forgiven." Ibn Shihab said: Our scholars used to say: This is the most complete ablution with which anyone performs ablution for prayer.