Musnad Ahmad 1223:2

Yunus narrated to us, Abu Ma'shar narrated to us, from Abd al-Rahman ibn Harmalah, from Abu Thifal al-Murri, from Rabah ibn Abd al-Rahman ibn Huwaytib, from his grandmother, who said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "He has not believed in Allah who has not believed in me, and he has not believed in me who does not love the Ansar. And there is no prayer for one who has no ablution, and there is no ablution for one who does not mention the name of Allah upon it."