Mukhtasar Muslim (Abridged) 130 — Whoever performed ablution

It is narrated from Humran that Sayyiduna Uthman (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings of Allah be upon him) said: Whoever performs ablution completely as Allah Almighty has commanded him, then the obligatory prayers will be an expiation for all the sins committed between those prayers.