It wasnarrated that Samurah bin Jundab said:
"There are two pauseswhich I memorized from the Messenger of Allah (ﷺ), but `Imran binHusain denied that. We wrote to Ubayy bin Ka`b in Al-Madinah, andhewrote that Samurah had indeed memorized them."(One of the narrators) Sa`eed said: "We said to Qatadah: 'What are these two pauses?' He said: 'When he started his prayer, and when he finished reciting.'Then later he said: 'And when he recited: 'Not (the way) of those who earned your anger, nor of those who went astray.' They used to like (for the Imam) when he had finished reciting to remain silent until he had caught his breath.'"
English reference: Vol. 1, Book 5, Hadith 844
Arabic reference: Book 5, Hadith 893