Abdullah ibn Shaddad · The Book of Purification and its Sunnah

The Prophet said: "There is no prayer for one who does not have ablution, and there is no ablution for one who does not mention the Name of Allah (before it). There is no prayer for one who does not send blessing, (Salat) upon the Prophet, and there is no prayer for one who does not love the Ansar." (Da'if) Another chain with similar wording.