[Machine] The Messenger of Allah ﷺ prayed Fajr in Mina, then he turned and saw two men behind the people. So, he called them and they came to him trembling. He said, "What prevented you from praying with the people?" They said, "We had already prayed in our camp." He said, "Do not do so if one of you has prayed in his camp, and then he catches up with the prayer led by the imam, then he should still pray it with him, for it will be a voluntary prayer for him."
صَلَّى رَسُولُ اللهِ ﷺ الْفَجْرَ بِمِنًى فَانْحَرَفَ فَرَأَى رَجُلَيْنِ مِنْ وَرَاءَ النَّاسِ فَدَعَا بِهِمَا فَجِيءَ بِهِمَا تَرْعَدُ فَرَائِصُهُمَا فَقَالَ مَا مَنَعَكُمَا أَنْ تُصَلِّيَا مَعَ النَّاسِ؟ فَقَالَا قَدْ كُنَّا صَلَّيْنَا فِي الرِّحَالِ قَالَ فَلَا تَفْعَلَا إِذَا صَلَّى أَحَدُكُمْ فِي رَحْلِهِ ثُمَّ أَدْرَكَ الصَّلَاةَ مَعَ الْإِمَامِ فَلْيُصَلِّهَا مَعَهُ فَإِنَّهَا لَهُنَافِلَةٌ