Sahih Bukhari

Allah's Messenger (ﷺ) once led us in a prayer and offered two rak`at and got up (for the third rak`a) without sitting (after the second rak`a). The people also got up with him, and when he was about to finish his prayer, we waited for him to finish the prayer with Taslim but he said Takbir before Taslim and performed two prostrations while sitting and then finished the prayer with Taslim.

Allah's Messenger (ﷺ) got up after the second rak`a of the Zuhr prayer without sitting in between (the second and the third rak`at). When he finished the prayer he performed two prostrations (of Sahu) and then finished the prayer with Taslim.

Once Allah's Messenger (ﷺ) offered five rak`at in the Zuhr prayer, and somebody asked him whether there was some increase in the prayer. Allah's Messenger (ﷺ) said, "What is that?" He said, "You have offered five rak`at." So Allah's Messenger (ﷺ) performed two prostrations of Sahu after Taslim.

The Prophet (ﷺ) led us in the `Asr or the Zuhr prayer and finished it with Taslim. Dhul-Yadain said to him, "O Allah's Messenger (ﷺ)! Has the prayer been reduced?" The Prophet (ﷺ) asked his companions in the affirmative. So Allah's Messenger (ﷺ) I offered two more rak`at and then performed two prostrations (of Sahu). Sa`d said, "I saw that 'Urwa bin Az-Zubair had offered two rak`at in the Maghrib prayer and finished it with Taslim. He then talked (and when he was informed about it) he completed the rest of his prayer and performed two prostrations, and said, 'The Prophet (ﷺ) prayed like this.' "

Once Allah's Messenger (ﷺ) offered two rak`at and finished his prayer. So Dhul-Yadain asked him, "Has the prayer been reduced or have you forgotten?" Allah's Messenger (ﷺ) said, "Has Dhul-Yadain spoken the truth?" The people replied in the affirmative. Then Allah's Messenger (ﷺ) stood up and offered the remaining two rak`at and performed Taslim, and then said Takbir and performed two prostrations like his usual prostrations, or a bit longer, and then got up.

I asked Muhammad (bin Seereen) whether Tashah-hud should be recited after the two prostrations of Sahu. He replied, "It is not (mentioned) in Abu Huraira's narration . "