عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ رَضِيَ اللَّهُ عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ: ((أَلَا أَدُلُّكُمْ عَلَى مَا يُكَفِّرُ اللَّهُ بِهِ الْخَطَايَا وَيَزِيدُ بِهِ فِي الْحَسَنَاتِ؟)) قَالُوا: بَلَى يَا رَسُولَ اللَّهِ! قَالَ: ((إِسْبَاغُ الْوُضُوءِ عَلَى الْمَكَارِهِ وَكَثْرَةُ الْخُطَى إِلَى هَٰذِهِ الْمَسَاجِدِ وَانْتِظَارُ الصَّلَاةِ بَعْدَ الصَّلَاةِ، مَا مِنْكُمْ مِنْ رَجُلٍ يَخْرُجُ مِنْ بَيْتِهِ مُتَطَهِّرًا فَيُصَلِّي مَعَ الْمُسْلِمِينَ الصَّلَاةَ ثُمَّ يَجْلِسُ فِي الْمَجْلِسِ يَنْتَظِرُ الصَّلَاةَ الْأُخْرَى إِلَّا الْمَلَائِكَةُ تَقُولُ: اللَّهُمَّ اغْفِرْ لَهُ، اللَّهُمَّ ارْحَمْهُ، فَإِذَا قُمْتُمْ إِلَى الصَّلَاةِ فَاعْدِلُوا صُفُوفَكُمْ وَأَقِيمُوهَا وَسُدُّوا الْفُرَجَ فَإِنِّي أَرَاكُمْ مِنْ وَرَاءِ ظَهْرِي، فَإِذَا قَالَ إِمَامُكُمُ اللَّهُ أَكْبَرُ، فَقُولُوا اللَّهُ أَكْبَرُ، وَإِذَا رَكَعَ فَارْكَعُوا، وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا اللَّهُمَّ رَبَّنَا لَكَ الْحَمْدُ، وَإِنَّ خَيْرَ صُفُوفِ الرِّجَالِ الْمُقَدَّمُ، وَشَرَّهَا الْمُؤَخَّرُ، وَخَيْرَ صُفُوفِ النِّسَاءِ الْمُؤَخَّرُ، وَشَرَّهَا الْمُقَدَّمُ، يَا مَعْشَرَ النِّسَاءِ! إِذَا سَجَدَ الرِّجَالُ فَاغْضُضْنَ أَبْصَارَكُنَّ لَا تَرَيْنَ عَوْرَاتِ الرِّجَالِ مِنْ ضِيقِ الْأَزُرِ))
It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Shall I not guide you to such deeds through which Allah forgives sins and increases good deeds? They said: Why not, O Messenger of Allah! He (peace and blessings be upon him) said: Performing ablution perfectly despite dislikes, taking many steps towards these mosques, and waiting for the next prayer after performing one prayer. Whoever among you leaves his house in a state of ablution and, after offering a prayer with the Muslims, sits in the same place waiting for the next prayer, the angels pray for him: O Allah! Forgive him, O Allah! Have mercy on him. When you stand for prayer, straighten and align your rows and fill the gaps, for indeed I see you from behind my back. When your Imam says Allahu Akbar, you also say Allahu Akbar; when he bows (in ruku‘), you bow; and when he says Sami‘ Allahu liman hamidah, you say Rabbana lakal hamd. Indeed, the best rows for men are the front rows and the worst are the last rows, and the best rows for women are the last rows and the worst are the front rows. O assembly of women! When the men go into prostration, lower your gaze so that, due to their garments being short, you do not see their private parts.