Musannaf Ibn Abi Shaybah

Some elders of Banu Rasib narrate that Hazrat Talha and Hazrat Zubair performed prayer in our mosque. There was no imam present, so we said to them, "One of you should step forward and lead the prayer, because you are among the companions of the Messenger of Allah, peace and blessings be upon him." Both of them refused to lead and said, "Where is the imam? Where is the imam?" Meanwhile, the imam arrived and led the people in prayer. When the prayer was finished, both of them said, "Every act of your prayer is correct, but there is one thing that is not good." We asked, "What is that?" They replied, "When the imam says salam (ends the prayer), the followers should not stand up until the imam turns his face or gets up from his place."