Ayyub narrated: Abu Qilabah said : Malik bin Huwairith came to us and led us in salah in this mosque of ours and said:
“I lead you in Salah,just to show you how Allah’s Messenger sallallahu alaihi wasalam performed his Salah”
I asked Abu Qilabah, “How was the solah of Malik bin Huwairith?” He replied, “Like the solah of this sheikh of ours (Amr bin Salamah)
“That Sheikh used to pronounce the Takbir perfectly and when he raised his head from the second prostration, he would sit for a while and then support himself on the ground and get up. (Bukhari)
Malik bin Huwairith Al Laithi narrated:
I saw he Prophet sallallahu alaihi wasalam performing salaah and in the odd rakaah, he used to sit for a moment before getting up (Bukhari)
There is a difference of opinion as whether this is wajib or sunat muakkad or mustahab when there is a need to do so. It is mustahab when there is a need to do so insya Allah. Refer HERE.