Musnad Ahmad 775:8

Isma'il narrated to us, Laith informed us, from Mudrik, from 'Abdullah ibn Abi Awfa, that the Messenger of Allah, peace and blessings of Allah be upon him, used to supplicate and say: "O Allah, purify me with snow, hail, and cold water. O Allah, purify my heart from sins just as You purified the white garment from filth, and distance between me and my sins just as You distanced between the East and the West. O Allah, I seek refuge in You from a heart that does not humble itself, from a soul that is never satisfied, from a supplication that is not heard, and from knowledge that does not benefit. O Allah, I seek refuge in You from these four. O Allah, I ask You for a pious life, a righteous death, and a return that is not disgraceful."