Authentic
Sunan an-Nasa'i 857
"What kept you from praying? Are you not a Muslim man?" He said: "Yes, but I had already prayed with my family." The Messenger of Allah (ﷺ)said to him: "When you come you should pray with the people even if you have already prayed."
" مَا مَنَعَكَ أَنْ تُصَلِّيَ أَلَسْتَ بِرَجُلٍ مُسْلِمٍ " . قَالَ بَلَى وَلَكِنِّي كُنْتُ قَدْ صَلَّيْتُ فِي أَهْلِي فَقَالَ لَهُ رَسُولُ اللَّهِ صلى الله عليه وسلم " إِذَا جِئْتَ فَصَلِّ مَعَ النَّاسِ وَإِنْ…