كتاب الطهارة
1  
The Book of Purification
(4)
Chapter: Ablution (Wudu)
(4)
باب الوضوء
Bulugh al-Maram 35
Narrated ‘Abdullah bin Zaid bin ‘Aasim (rad) describing the nature of ablution performance:
Allah’s Messenger (ﷺ) wiped his head from the forehead to the back of his head and then back to the forehead with his (wet) hands. [ Agreed upon ].
وَعَنْ عَبْدِ اَللَّهِ بْنِ يَزِيدَ بْنِ عَاصِمٍ ‏- رضى الله عنه ‏- ‏-فِي صِفَةِ اَلْوُضُوءِ‏- قَالَ: { وَمَسَحَ ‏- صلى الله عليه وسلم ‏-بِرَأْسِهِ, فَأَقْبَلَ بِيَدَيْهِ وَأَدْبَرَ.‏ } مُتَّفَقٌ عَلَيْه ِ 1‏ .‏


‏1 ‏- صحيح.‏ رواه البخاري (186)‏، ومسلم (235)‏.‏

Reference : Bulugh al-Maram 35
In-book reference : Book 1, Hadith 40
English translation : Book 1, Hadith 39