Sunan Ibn Majah 275
Hasan Sahih Graded by Al-Albani Book of The Book of Purification and its Sunnah · Hadith 275 of 4,341حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا وَكِيعٌ، عَنْ سُفْيَانَ، عَنْ عَبْدِ اللَّهِ بْنِ مُحَمَّدِ بْنِ عَقِيلٍ، عَنْ مُحَمَّدٍ ابْنِ الْحَنَفِيَّةِ، عَنْ أَبِيهِ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " مِفْتَاحُ الصَّلاَةِ الطُّهُورُ وَتَحْرِيمُهَا التَّكْبِيرُ وَتَحْلِيلُهَا التَّسْلِيمُ " .
Narrated by Muhammed bin Al-Hanafiyyah
It was narrated from Muhammed bin Al-Hanafiyyah that his father said:"The Messenger of Allah said: 'The key to prayer is purification, its opening is to say 'Allahu Akbar' and its closing is to say As-salamu 'alaikum
References
Sunan Ibn Majah 275
In-book: Book 1, Hadith 9 Source: hadith-api (fawazahmed0)