عَنْ أَبِي أُمَامَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: ((مَا مِنْ إِمْرَئٍ مُسْلِمٍ تَحْضُرُهُ صَلَاةٌ مَكْتُوبَةٌ فَيَقُومُ فَيَتَوَضَّأُ فَيُحْسِنُ الْوُضُوءَ فَيُصَلِّي فَيُحْسِنُ الصَّلَاةَ إِلَّا غَفَرَ اللَّهُ لَهُ بِهَا مَا كَانَ بَيْنَهَا وَبَيْنَ الصَّلَاةِ الَّتِي كَانَتْ قَبْلَهَا مِنْ ذُنُوبِهِ، ثُمَّ يَحْضُرُ صَلَاةً مَكْتُوبَةً فَيُصَلِّي فَيُحْسِنُ الصَّلَاةَ إِلَّا غُفِرَ لَهُ مَا بَيْنَهَا وَبَيْنَ الصَّلَاةِ الَّتِي كَانَتْ قَبْلَهَا مِنْ ذُنُوبِهِ، ثُمَّ يَحْضُرُ صَلَاةً مَكْتُوبَةً فَيُصَلِّي فَيُحْسِنُ الصَّلَاةَ إِلَّا غُفِرَ لَهُ مَا بَيْنَهَا وَبَيْنَ الصَّلَاةِ الَّتِي كَانَتْ قَبْلَهَا مِنْ ذُنُوبِهِ))
Sayyiduna Abu Umamah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: Whenever the time for an obligatory prayer comes upon a Muslim, and he stands up, performs ablution and performs it well, then he offers the prayer and performs it well, Allah Almighty, because of this prayer, forgives the sins committed between this prayer and the previous prayer. Then when the time for the next obligatory prayer comes, and he offers the prayer and performs it well, the sins committed between this prayer and the previous prayer are forgiven. Thereafter, when the time for the next obligatory prayer comes and he offers the prayer and performs it well, the sins committed between this prayer and the previous prayer are forgiven.