[Machine] We used to speak during prayer and greet each other, and one of us would indicate to his companion about a need. So, one day I came and the Messenger of Allah ﷺ was praying, so I greeted him but he did not respond to me. He held me by the shoulders and told me what was before and what will happen. When the Messenger of Allah ﷺ finished, he said, "Verily, Allah speaks of His affairs as He wills, and indeed He has ordered that you do not speak during the prayer."
كُنَّا نَتَكَلَّمُ فِي الصَّلَاةِ وَيُسَلِّمُ بَعْضُنَا عَلَى بَعْضٍ وَيُومِئُ أَحَدُنَا لِصَاحِبِهِ بِالْحَاجَةِ فَجِئْتُ ذَاتَ يَوْمٍ وَرَسُولُ اللهِ ﷺ يُصَلِّي فَسَلَّمْتُ عَلَيْهِ فَلَمْ يَرُدَّ عَلَيَّ فَأَخَذَنِي مَا قَدُمَ وَمَا حَدُثَ فَلَمَّا فَرَغَ رَسُولُ اللهِ ﷺ قَالَ «إِنَّ اللهَ يُحْدِثُ مِنْ أَمْرِهِ مَا يَشَاءُ وَقَدْ أَحْدَثَ أَنْ لَا تَكَلَّمُوا فِي الصَّلَاةِ»