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

Hadith on Greetings: The best greeting is peace, mercy, and blessings from Allah be upon you

Imran ibn Hussein reported: A man came to the Prophet, peace be upon him, and he said, “Peace be upon you.” The Prophet said, “Ten good deeds.” Then another man came to the Prophet and he said, “Peace be upon you and the mercy of Allah.” The Prophet said, “Twenty good deeds.” Then another man came to the Prophet and he said, “Peace be upon you and the mercy of Allah and His blessings.” The Prophet said, “Thirty good deeds.”

[Sunan At-Tirmidhi, Book of Manners, Number 2689, Sahih]

عَنْ عِمْرَانَ بْنِ حُصَيْنٍ أَنَّ رَجُلًا جَاءَ إِلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ السَّلَامُ عَلَيْكُمْ قَالَ قَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَشْرٌ ثُمَّ جَاءَ آخَرُ فَقَالَ السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عِشْرُونَ ثُمَّ جَاءَ آخَرُ فَقَالَ السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ وَبَرَكَاتُهُ فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ثَلَاثُونَ

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ غَرِيبٌ

سنن الترمذي  كِتَاب الِاسْتِئْذَانِ وَالْآدَابِ  بَاب مَا ذُكِرَ فِي فَضْلِ السَّلَامِ

Hadith on Peace: The Prophet would end his prayers with invocations for peace and mercy

Alqama ibn Wa’il reported that his father said: I prayed with the Prophet, peace be upon him, and he would invoke peace on his right said, saying, “Peace, mercy, and blessings of Allah be upon you,” and again to his left side, saying, “Peace, mercy, and blessings of Allah be upon you.”

[Sunan Abu Dawud, Book of Prayer, Number 997, Hasan]

عَنْ عَلْقَمَةَ بْنِ وَائِلٍ عَنْ أَبِيهِ قَالَ صَلَّيْتُ مَعَ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَكَانَ يُسَلِّمُ عَنْ يَمِينِهِ السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ وَبَرَكَاتُهُ وَعَنْ شِمَالِهِ السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ

سنن أبي داود كِتَاب الصَّلَاةِ بَاب تَفْرِيعِ أَبْوَابِ الرُّكُوعِ وَالسُّجُودِ ووَضْعِ الْيَدَيْنِ عَلَى الرُّكْبَتَيْنِ – يسلم عن يمينه السلام عليكم ورحمة الله وبركاته وعن شماله السلام عليكم ورحمة الله