Muwatta Imam Malik (Riwayat Ibn al-Qasim)

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) ended the prayer after two rak‘ahs with salam. Then (a companion) Dhu’l-Yadayn (may Allah be pleased with him) asked him: “O Messenger of Allah! Has the prayer been shortened or did you forget?” The Messenger of Allah (peace and blessings be upon him) said (to the people): “Did Dhu’l-Yadayn speak the truth?” The people replied: “Yes!” Then the Messenger of Allah (peace and blessings be upon him) stood up and led the last two rak‘ahs (of Zuhr or ‘Asr), then he ended the prayer with salam. Then he said takbir and performed a prostration like his usual prostrations or even longer, then (saying takbir) he raised his head, then said takbir and performed another prostration like his usual prostrations or even longer.