Sunan Abi Dawud Book 42, Hadith 26
I was a prisoner in Syria. A man called me from behind. I turned towards him and suddenly found that it was Raja b. Haiwah. He said: Abu ‘Awn, what is this that the people are telling about al-Hasan? I said: They are much lying to al-Hasan.
Between them and their faith.
I heard Ayyub say: Two kinds of people have lied to al-Hasan: people who believed in free will and they intended that they publicise their belief by it; and people who had enmity with and hostility (for al-Hasan), saying: Did he not say so and so? Did he not say so and so?