Musnad Ahmad 30:1767

Yazid ibn Harun narrated to us, Ismail ibn Abi Khalid informed us, from his father, and he said: He was staying with Abu Hurairah in Medina. He said: "I saw him praying a prayer that was neither light nor long." Ismail said: Similar to the prayer of Qays ibn Abi Hazim. He said: So I said to Abu Hurairah, "Is this how the Messenger of Allah, may Allah bless him and grant him peace, used to pray?" He said: "And what did you find objectionable about my prayer?" He said: I said, "Good; I just wanted to ask you." He said: So he said, "Yes, and he used to be brief."