Musannaf Ibn Abi Shayba 3:4949

Shababa narrated to us, from Shu'bah, from Abu al-Tayyah, who said: I heard Humran ibn Aban narrating from Mu'awiyah that he looked at some people praying after the 'Asr [prayer], and he said: "You are performing a prayer that we accompanied the Messenger of Allah, may Allah bless him and grant him peace, and we never saw him perform it, and he forbade it."