حَدَّثَنَا ابْنُ الْمُثَنَّى، حَدَّثَنَا عَبْدُ الأَعْلَى، حَدَّثَنَا سَعِيدٌ، بِهَذَا قَالَ عَنْ قَتَادَةَ، عَنِ الْحَسَنِ، عَنْ سَمُرَةَ، قَالَ سَكْتَتَانِ حَفِظْتُهُمَا عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم ‏.‏ قَالَ فِيهِ قَالَ سَعِيدٌ قُلْنَا لِقَتَادَةَ مَا هَاتَانِ السَّكْتَتَانِ قَالَإِذَا دَخَلَ فِي صَلاَتِهِ وَإِذَا فَرَغَ مِنَ الْقِرَاءَةِ ثُمَّ قَالَ بَعْدُ وَإِذَا قَالَ ‏‏{‏ غَيْرِ الْمَغْضُوبِ عَلَيْهِمْ وَلاَ الضَّالِّينَ ‏}‏ ‏.‏
Translation
Narrated Samurah ibn Jundub

I remember two periods of silence which I memorized from the Messenger of Allah (ﷺ). Sa'id said: We said to Qatadah: What are these two periods of silence? He said: When he entered into his prayer, and when he finished the recitation. Then he said afterwards: And when he said: Not of those with whom Thou art angry, nor of those who go astray.