Qays bin Abi Hazim (may Allah have mercy on him) narrates that Sayyiduna Sa'd bin Abi Waqqas (may Allah be pleased with him) led us in prayer. After two rak'ahs he stood up (without sitting). We said "Subhan Allah", but he stood up fully and continued standing until he finished the prayer. Then he said: "Did you think that I would sit down? I only did as I saw the Messenger of Allah (peace and blessings be upon him) do." Abu Uthman Amr bin Muhammad al-Naqid (may Allah have mercy on him) said: "We have not heard anyone narrate this as marfu' (from the Prophet) except Abu Mu'awiyah."
Hadith Referenceمسند أبي يعلى الموصلي / مسند سعد بن أبي وقاص / 759
Hadith Takhrij«قال سعيد بن محمد السناري: منكر» «أخرجه ابن خزيمة [رقم/ 1032]، وابن منيع في "مسنده" كما في "المطالب العالية" [4/ 604/ طبعة العاصمة]، و، مسند ابویعلیٰ ترقیم الاثری: 754»