Musnad Ahmad 32:2001

Yazid and Abu Nuh narrated to us, they said: Shu'bah narrated to us, from Qatadah, from Anas. Abu Nuh said: And he heard it from him. And Hashim and al-Hajjaj narrated to us, they said: Shu'bah narrated to us, from Qatadah, he said: I heard Anas saying: "The Prophet, may Allah bless him and grant him peace, was among the lightest of people in prayer, while [still] completing it."