كيفية الغسل وهو أن يضع الاناء عن يمينه ثم يسمي الله تعالى ويغسل يديه ثلاثاً ثم يستنجي كما وصفناه ويزيل ما على بدنه من نجاسة إن كانت ثم كما سبق إلا غسل قدميه فإنه يؤخِّرهما فإن غسلهما ثم وضعهما على الأرض كالاضاعة للماء ثم يصب الماء على شقّه الأيمن ثلاثاً ثم على شقه الأيسر ثلاثاً ثم على رأسه ثلاثاً ثم يدلك ما أقبل من بدنه وما أدبر ويخلل شعر الرأس واللحية ويوصل الماء إلى منابتها ما كثف منه أو حفَّ وليس على المرأة نقض الضفائر إلا إذا علمت أن الماء لا يصل إلى خلل الشعر ويتعهد معاطف البدن وليتقِ أن يمس ذكره في أثناء ذلك فإن فعل ذلك فليعد الوضوء وإن توضأ قبل الغسل فلا يعيده بعد الغسل
إحياء علوم الدين للغزالي كتاب أسرار الطهارة ومهماتها
[Manner of performing ghusl, full washing] is that one place the vessel on his right side, then invoke the name of Allah Most High [i.e. by saying bismillah…], wash his hands three times, then perform a general cleansing as we have described, removing the filth from his body if there is any. Then he is to perform ablution [wudu’ ] as is done for prayer, as stated earlier, but without washing his feet; these he is to delay, for indeed if he washes them, and then places them on the ground, it is a waste of water. Then he is to pour water over his right side three times, then over his left side three times, then over his head three times, then he is to rub down his front and back sides, then run through his head and beard hair, then return the water to where it came from, whether much or little. (A woman is not required to undo her hairlocks unless she knows that the water will not reach down to the roots.) And he is to pay attention to the crooks of his body, and take care not to touch his penis during all of this; if he does, he is to repeat ablution. And if he performs wudu' before ghusl, he does not need to repeat it following ghusl.
Al-Ghazali, Ihyaa ‘Ulum Al-deen, The book of the foundations of purity [tahara] and its requirements