[Machine] The Prophet ﷺ prayed a prayer, then when he finished his prayer, he found two men behind the people. So he ordered them and they came trembling. Their garments were shaking. He said, "What caused both of you not to pray with us?" They said, "O Messenger of Allah, we already prayed in our tents. Then we came here." The Prophet ﷺ said, "If you both pray in your tents and then catch up with the congregation, then pray, for it will be an additional (optional) prayer for you."
صَلَّى النَّبِيُّ ﷺ صَلَاةً فَلَمَّا قَضَى صَلَاتَهُ إِذَا هُو بِرَجُلَيْنِ فِي مُؤَخَّرِ النَّاسِ فَأَمَرَ بِهِمَا فَجِيءَ بِهِمَا تَرْعَدُ فَرَائِصُهُمَا فَقَالَ مَا حَمَلَكُمَا عَلَى أَنْ لَمْ تُصَلِّيَا مَعَنَا قَالَا يَا نَبِيَّ اللهِ صَلَّيْنَا فِي الرِّحَالِ ثُمَّ أَقْبَلْنَا فَقَالَ النَّبِيُّ ﷺ إِذَا صَلَّيْتُمَا فِي رِحَالِكُمَا ثُمَّ أَدْرَكْتُمَا الصَّلَاةَ فَصَلِّيَا فَإِنَّهَا لَكُمَا نَافِلَةٌ