(31) باب فَرْضِ الْوُضُوءِ
Narrated Ali ibn AbuTalib:
The key to prayer is purification; its beginning is takbir and its end is taslim. (RU)
Reference (RU): Sunan Abi Dawud 61 (RU)
In-book reference (RU): Book 1, Hadith 61 (RU)
English translation (RU): Book 1, Hadith 61 (RU)