Musnad Ahmad 1223:3

'Affan narrated to us, he said: Wuhayb narrated to us, he said: 'Abd al-Rahman ibn Harmalah narrated to us, that he heard Abu Thifal narrating, he says: I heard Rabah ibn 'Abd al-Rahman—and 'Affan did not say once: ibn Abi Sufyan ibn Huwaytib—saying: My grandmother narrated to me, that she heard her father saying: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "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 over it. And he does not believe in Allah who does not believe in me, and he does not believe in me who does not love the Ansar."