Masrouq bin al-Ajda' مسروق بن الأجدع · The Book of Ghusl and Tayammum

"When the Messenger of Allah (ﷺ) performed Ghusl from Janabah, he would wash his hands, then perform Wudu' as for prayer, then he would perform Ghusl, then run his fingers through his hair to be sure that the water pour water over his head three times, then wash the rest of his body."