It was narrated from Abu Hurairah that :A man asked him: "How much water should I pour over my head when I m sexually impure?" He said: "the messenger of Allah used to pour three handfuls of water over his head." The man said: "My hair is long." He said: "The Messenger of Allah had more hair than you and he was cleaner."
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَبُو خَالِدٍ الأَحْمَرُ، عَنِ ابْنِ عَجْلاَنَ، عَنْ سَعِيدِ بْنِ أَبِي سَعِيدٍ، عَنْ أَبِي هُرَيْرَةَ، سَأَلَهُ رَجُلٌ كَمْ أُفِيضُ عَلَى رَأْسِي وَأَنَا جُنُبٌ قَالَ كَانَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ يَحْثُو عَلَى رَأْسِهِ ثَلاَثَ حَثَيَاتٍ . قَالَ الرَّجُلُ إِنَّ شَعْرِي طَوِيلٌ . قَالَ كَانَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ أَكْثَرَ شَعَرًا مِنْكَ وَأَطْيَبَ .
IbnMaja
The Book of Purification and its Sunnah • Hadith 578