Ibn Mas’ud on Jama’ah: Strong encouragement to pray in congregation

Abu al-Ahwas reported: Abdullah ibn Mas’ud, may Allah be pleased with him, said, “Whoever would be pleased to meet Allah tomorrow as a Muslim, let him guard over these prayers when they are announced. Verily, Allah has instituted for His Prophet, peace and blessings be upon him, practices of guidance, for they are indeed practices of guidance. If you were to pray in your houses like one who keeps to his house, you would have abandoned the practice of your Prophet, and if you were to abandon a practice of your Prophet, you have been misguided. No man purifies himself in the best manner and then proceeds to one of these mosques but that Allah records a good deed for every step he takes, raises him by a degree, and erases a sin. We have seen a time when no one leaves it but a hypocrite whose hypocrisy is known, whereas a weak man would come being carried by two men until he was placed within the rows.”

Source: Ṣaḥīḥ Muslim 654

Source: Sahih (authentic) according to Muslim

عَنْ ‌أَبِي الْأَحْوَصِ عَنْ ‌عَبْدِ اللهِ رضي الله عنه قَالَ مَنْ سَرَّهُ أَنْ يَلْقَى اللهَ غَدًا مُسْلِمًا فَلْيُحَافِظْ عَلَى هَؤُلَاءِ الصَّلَوَاتِ حَيْثُ يُنَادَى بِهِنَّ فَإِنَّ اللهَ شَرَعَ لِنَبِيِّكُمْ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ سُنَنَ الْهُدَى وَإِنَّهُنَّ مِنْ سُنَنِ الْهُدَى وَلَوْ أَنَّكُمْ صَلَّيْتُمْ فِي بُيُوتِكُمْ كَمَا يُصَلِّي هَذَا الْمُتَخَلِّفُ فِي بَيْتِهِ لَتَرَكْتُمْ سُنَّةَ نَبِيِّكُمْ وَلَوْ تَرَكْتُمْ سُنَّةَ نَبِيِّكُمْ لَضَلَلْتُمْ وَمَا مِنْ رَجُلٍ يَتَطَهَّرُ فَيُحْسِنُ الطُّهُورَ ثُمَّ يَعْمِدُ إِلَى مَسْجِدٍ مِنْ هَذِهِ الْمَسَاجِدِ إِلَّا كَتَبَ اللهُ لَهُ بِكُلِّ خُطْوَةً يَخْطُوهَا حَسَنَةً وَيَرْفَعُهُ بِهَا دَرَجَةً وَيَحُطُّ عَنْهُ بِهَا سَيِّئَةً وَلَقَدْ رَأَيْتُنَا وَمَا يَتَخَلَّفُ عَنْهَا إِلَّا مُنَافِقٌ مَعْلُومُ النِّفَاقِ وَلَقَدْ كَانَ الرَّجُلُ يُؤْتَى بِهِ يُهَادَى بَيْنَ الرَّجُلَيْنِ حَتَّى يُقَامَ فِي الصَّفِّ

654 صحيح مسلم كتاب المساجد ومواضع الصلاة باب صلاة الجماعة من سنن الهدى