Starting from the right side of one's head while taking a bath Sahih al-Bukhari 277
Arabic hadith text
حَدَّثَنَا خَلاَّدُ بْنُ يَحْيَى، قَالَ حَدَّثَنَا إِبْرَاهِيمُ بْنُ نَافِعٍ، عَنِ الْحَسَنِ بْنِ مُسْلِمٍ، عَنْ صَفِيَّةَ بِنْتِ شَيْبَةَ، عَنْ عَائِشَةَ، قَالَتْ كُنَّاإِذَا أَصَابَتْ إِحْدَانَا جَنَابَةٌ، أَخَذَتْ بِيَدَيْهَا ثَلاَثًا فَوْقَ رَأْسِهَا، ثُمَّ تَأْخُذُ بِيَدِهَا عَلَى شِقِّهَا الأَيْمَنِ، وَبِيَدِهَا الأُخْرَى عَلَى شِقِّهَا الأَيْسَرِ.
Translation
Narrated Aisha
Whenever any one of us was Junub, she poured water over her head thrice with both her hands and then rubbed the right side of her head with one hand and rubbed the left side of the head with the other hand.