Muwatta Imam Malik Book of Prayer in Congregation, Hadith 9

Yahya related to me from Malik from Zayd ibn Aslam from a man of the Bani'd-Dil called Busr ibn Mihjan from his father Mihjan that he was in a gathering with the Messenger of Allah ﷺ and the call to prayer was made. The Messenger of Allah ﷺ rose and prayed and then returned. Mihjan remained sitting and did not pray with him. The Messenger of Allah ﷺ said, "What prevented you from praying with the people? Aren't you a muslim?" He said, "Of course, Messenger of Allah, but I have already prayed with my family." The Messenger of Allah ﷺ said, "When you come, pray with the people, even if you have prayed already."

حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ رَجُلٍ، مِنْ بَنِي الدِّيلِ يُقَالُ لَهُ بُسْرُ بْنُ مِحْجَنٍ عَنْ أَبِيهِ، مِحْجَنٍ أَنَّهُ كَانَ فِي مَجْلِسٍ مَعَ رَسُولِ اللَّهِ ﷺ فَأُذِّنَ بِالصَّلاَةِ فَقَامَ رَسُولُ اللَّهِ ﷺ فَصَلَّى ثُمَّ رَجَعَ وَمِحْجَنٌ فِي مَجْلِسِهِ لَمْ يُصَلِّ مَعَهُ فَقَالَ لَهُ رَسُولُ اللَّهِ ﷺ " مَا مَنَعَكَ أَنْ تُصَلِّيَ مَعَ النَّاسِ أَلَسْتَ بِرَجُلٍ مُسْلِمٍ " . فَقَالَ بَلَى يَا رَسُولَ اللَّهِ وَلَكِنِّي قَدْ صَلَّيْتُ فِي أَهْلِي . فَقَالَ لَهُ رَسُولُ اللَّهِ ﷺ " إِذَا جِئْتَ فَصَلِّ مَعَ النَّاسِ وَإِنْ كُنْتَ قَدْ صَلَّيْتَ " .