Musnad Ahmad 947:13

Isma'il ibn Ibrahim narrated to us, Ibn Jurayj narrated to us, from 'Abdullah ibn 'Uthman ibn Khuthaym, from Nafi' ibn Sarjas, who said: We visited Abu Waqid al-Kindi during the illness in which he passed away. He said: "The Messenger of Allah, may Allah bless him and grant him peace, was the lightest of people in prayer for the people, and the longest of people in prayer for himself."