Musannaf Ibn Abi Shaybah 4845 — A man leading people in Zuhr and Asr

Abbad bin Mansur said: I came to the Jami' mosque, and I saw that the people had not yet prayed Zuhr. I began praying voluntary prayers while waiting for Zuhr, and meanwhile the congregation stood up for prayer. When they had finished the prayer, I learned that it had been the Asr prayer. So I then performed my Zuhr prayer, and then prayed Asr. Then I came to al-Hasan and asked him about this issue, and he instructed me to do just what I had done.