Hadith on Ablution: Every sin a Muslim commits will be washed away with the last drop of water

Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said, “When a Muslim or a believer washes his face in ablution, then every sin which he committed with his eyes will be washed away with the last drop of water; when he washes his hands, then every sin which he committed with his hands will be washed away with the last drop of water; and when he washes his feet, then every sin which he committed with his feet will be washed away with the last drop of water until he emerges purified from sin.”

Source: Sahih Muslim 244

Grade: Sahih (authentic) according to Imam Muslim

عَنْ أَبِي هُرَيْرَةَ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ إِذَا تَوَضَّأَ الْعَبْدُ الْمُسْلِمُ أَوْ الْمُؤْمِنُ فَغَسَلَ وَجْهَهُ خَرَجَ مِنْ وَجْهِهِ كُلُّ خَطِيئَةٍ نَظَرَ إِلَيْهَا بِعَيْنَيْهِ مَعَ الْمَاءِ أَوْ مَعَ آخِرِ قَطْرِ الْمَاءِ فَإِذَا غَسَلَ يَدَيْهِ خَرَجَ مِنْ يَدَيْهِ كُلُّ خَطِيئَةٍ كَانَ بَطَشَتْهَا يَدَاهُ مَعَ الْمَاءِ أَوْ مَعَ آخِرِ قَطْرِ الْمَاءِ فَإِذَا غَسَلَ رِجْلَيْهِ خَرَجَتْ كُلُّ خَطِيئَةٍ مَشَتْهَا رِجْلَاهُ مَعَ الْمَاءِ أَوْ مَعَ آخِرِ قَطْرِ الْمَاءِ حَتَّى يَخْرُجَ نَقِيًّا مِنْ الذُّنُوبِ

244 صحيح مسلم كِتَاب الطَّهَارَةِ باب خُرُوجِ الْخَطَايَا مَعَ مَاءِ الْوُضُوءِ

Hadith on Prayer: The opening and closing of prayer, and ablution is the key to prayer

Muhammad ibn al-Hanafiya reported: The Messenger of Allah, peace and blessings be upon him, said, “The key to the prayer is the performance of ablution; the opening of the prayer is the exaltation of Allah (takbeer) and the closing of the prayer is the invocation of peace (tasleem).”

[Sunan Ibn Majah, Book of Cleanliness, Number 275, Sahih]

عَنْ مُحَمَّدِ ابْنِ الْحَنَفِيَّةِ عَنْ أَبِيهِ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مِفْتَاحُ الصَّلَاةِ الطُّهُورُ وَتَحْرِيمُهَا التَّكْبِيرُ وَتَحْلِيلُهَا التَّسْلِيمُ

275 سنن ابن ماجه كِتَاب الطَّهَارَةِ وَسُنَنِهَا مفتاح الصلاة الطهور وتحريمها التكبير وتحليلها التسليم

وقال الحاكم هَذَا حَدِيثٌ صَحِيحُ الْإِسْنَادِ عَلَى شَرْطِ مُسْلِمٍ