Hadith 1:39
Narrated ‘Ali (rad) regarding the description of the ablution of the Prophet (ﷺ):
He (the Prophet) wiped his head (with water) only once. [Reported by Abu Da’ud, An-Nasa’i, AtTirmidhi with a Sahih Sanad (authentic chain of narrators). At-Tirmidhi said, “It’s the most Hadith on this subject”].
وَعَنْ عَلِيٍّ - رضى الله عنه - -فِي صِفَةِ وُضُوءِ اَلنَّبِيِّ صَلَّى اَللَّهُ عَلَيْهِ وَسَلَّمَ- قَالَ: { وَمَسَحَ بِرَأْسِهِ وَاحِدَةً. } أَخْرَجَهُ أَبُو دَاوُد َ (44)
Original Reference: Bulugh al-Maram 34