To sit for a while between the two prostrations

English translation

Narrated Abu Qilaba:

Once Malik bin Huwairith said to his friends, "Shall I show you how Allah's Messenger (ﷺ) used to offer his prayers?" And it was not the time for any of the compulsory congregational prayers. So he stood up (for the prayer) bowed and said the Takbir, then he raised his head and remained standing for a while and then prostrated and raised his head for a while (sat up for a while). He prayed like our Sheikh `Amr Ibn Salama. (Aiyub said, "The latter used to do a thing which I did not see the people doing i.e. he used to sit between the third and the fourth rak`a). Malik bin Huwairith said, "We came to the Prophet (after embracing Islam) and stayed with him. He said to us, 'When you go back to your families, pray such and such a prayer at such and such a time, pray such and such a prayer at such and such a time, and when there is the time for the prayer then only of you should pronounce the Adhan for the prayer and the oldest of you should lead the prayer."

English translation

Narrated Al-Bara':

The time taken by the Prophet (ﷺ) in prostrations, bowing, and the sitting interval between the two prostrations was about the same.

English translation

Narrated Thabit:

Anas said, "I will leave no stone unturned in making you offer the prayer as I have seen the Prophet (ﷺ) making us offer it." Anas used to do a thing which I have not seen you doing. He used to stand after the bowing for such a long time that one would think that he had forgotten (the prostrations) and he used to sit in-between the prostrations so long that one would think that he had forgotten the second prostration.