وَعَنْ عَائِشَةَ
قَالَتْ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَغْسِلُ رَأْسَهُ بِالْخِطْمِيِّ وَهُوَ جُنُبٌ يَجْتَزِئُ بِذَلِكَ وَلَا يَصُبُّ عَلَيْهِ الْمَاءَ
She also said that the Prophet (sallallahu alayhi wa sallam) used to wash his head with marshmallow when sexually defiled, contenting himself with that and not pouring water over it.
Mishkat al-Masabih 414, Book 4, Purification, Hadith 150. 1 min read