People made a mention of washing because of sexual defilement before the Messenger of Allah (May peace be upon him). The Messenger of Allah (May peace be upon him) said: I pour (water) on my head three times. And he made a sign with both his hands.  

عَنْ جُبَيْرِ بْنِ مُطْعِمٍ أَنَّهُمْ ذَكَرُوا عِنْدَ رَسُولِ اللَّهِ ﷺ الْغُسْلَ مِنَ الْجَنَابَةِ فَقَالَ رَسُولُ اللَّهِ ﷺ أَمَّا أَنَا فَأُفِيضُ عَلَى رَأْسِي ثَلاَثًا وَأَشَارَ بِيَدَيْهِ كِلْتَيْهِمَا  

when the Messenger of Allah (May peace be upon him) wanted to wash himself because of sexual defilement, he called for a vessel like HILAB (a vessel used for milking the camel). He then took a handful of water and began to pour it on the right side of his head and then on the left side. He then took water in both his hands together and poured it on his head.  

كَانَ رَسُولُ اللَّهِ ﷺ إِذَا اغْتَسَلَ مِنَ الْجَنَابَةِ دَعَا بِشَىْءٍ نَحْوِ الْحِلاَبِ فَأَخَذَ بِكَفِّهِ فَبَدَأَ بِشِقِّ رَأْسِهِ الأَيْمَنِ ثُمَّ الأَيْسَرِ ثُمَّ أَخَذَ بِكَفَّيْهِ فَقَالَ بِهِمَا عَلَى رَأْسِهِ  

Jumay' ibn Umayr, one of the sons of Banu Taym Allah ibn Tha'labah, said: Accompanied by my mother and aunt I entered upon Aisha. One of them asked her: How did you do while taking a bath? Aisha replied: The Messenger of Allah ﷺ performed ablution (in the beginning) as he did for prayer. He then poured (water) upon his head three times. But we poured water upon our heads five times due to plaits.  

دَخَلْتُ مَعَ أُمِّي وَخَالَتِي عَلَى عَائِشَةَ فَسَأَلَتْهَا إِحْدَاهُمَا كَيْفَ كُنْتُمْ تَصْنَعُونَ عِنْدَ الْغُسْلِ فَقَالَتْ عَائِشَةُ كَانَ رَسُولُ اللَّهِ ﷺ يَتَوَضَّأُ وُضُوءَهُ لِلصَّلاَةِ ثُمَّ يُفِيضُ عَلَى رَأْسِهِ ثَلاَثَ مَرَّاتٍ وَنَحْنُ نُفِيضُ عَلَى رُءُوسِنَا خَمْسًا مِنْ أَجْلِ الضَّفْرِ  

When the Messenger of Allah (May peace be upon him) would take a bath because of sexual defilement, according to the version of Sulaiman, in the beginning he would pour water with his right hand (upon his left hand); and according to the version of Musaddad, he would wash both (hands) pouring water from the vessel upon his right hand. According to the agreed version, he then would wash the private part. He would then perform ablution as he did for prayer, then put his hands in the vessel and made the water go through his hair. When he knew that water had reached the entire surface of the body and cleaned it well, he would pour water upon his head three times. If some water was left, he would pour it also upon himself.  

كَانَ رَسُولُ اللَّهِ ﷺ إِذَا اغْتَسَلَ مِنَ الْجَنَابَةِ قَالَ سُلَيْمَانُ يَبْدَأُ فَيُفْرِغُ مِنْ يَمِينِهِ عَلَى شِمَالِهِ وَقَالَ مُسَدَّدٌ غَسَلَ يَدَيْهِ يَصُبُّ الإِنَاءَ عَلَى يَدِهِ الْيُمْنَى ثُمَّ اتَّفَقَا فَيَغْسِلُ فَرْجَهُ قَالَ مُسَدَّدٌ يُفْرِغُ عَلَى شِمَالِهِ وَرُبَّمَا كَنَتْ عَنِ الْفَرْجِ ثُمَّ يَتَوَضَّأُ وُضُوءَهُ لِلصَّلاَةِ ثُمَّ يُدْخِلُ يَدَيْهِ فِي الإِنَاءِ فَيُخَلِّلُ شَعْرَهُ حَتَّى إِذَا رَأَى أَنَّهُ قَدْ أَصَابَ الْبَشَرَةَ أَوْ أَنْقَى الْبَشَرَةَ أَفْرَغَ عَلَى رَأْسِهِ ثَلاَثًا فَإِذَا فَضَلَ فَضْلَةٌ صَبَّهَا عَلَيْهِ  

'Aishah said; When the Messenger of Allah (May peace be upon him) intended to take a bath because of sexual defilement, he would begin with his hands and wash them. Then he would wash the joints of his limbs and pour water upon him when he cleansed both his (hands), he would rub them on the wall (to make them perfectly clean with the dust). Then he would perform ablution and pour water over his head.  

كَانَ رَسُولُ اللَّهِ ﷺ إِذَا أَرَادَ أَنْ يَغْتَسِلَ مِنَ الْجَنَابَةِ بَدَأَ بِكَفَّيْهِ فَغَسَلَهُمَا ثُمَّ غَسَلَ مَرَافِغَهُ وَأَفَاضَ عَلَيْهِ الْمَاءَ فَإِذَا أَنْقَاهُمَا أَهْوَى بِهِمَا إِلَى حَائِطٍ ثُمَّ يَسْتَقْبِلُ الْوُضُوءَ وَيُفِيضُ الْمَاءَ عَلَى رَأْسِهِ  

If you want, I can certainly show you the marks of the hand of the Messenger of Allah ﷺ on the wall where he took a bath because of sexual defilement.  

عَائِشَةُ ؓ لَئِنْ شِئْتُمْ لأُرِيَنَّكُمْ أَثَرَ يَدِ رَسُولِ اللَّهِ ﷺ فِي الْحَائِطِ حَيْثُ كَانَ يَغْتَسِلُ مِنَ الْجَنَابَةِ  

I placed (the vessel of) water for the Prophet (May peace be upon him) to wash himself because of sexual intercourse. He lowered down the vessel and poured water on his right hand. He then washed it twice or thrice. He then poured water over his private parts and washed them with his left hand. Then he put it on the ground and wiped it. He then rinsed his mouth and snuffed up water, and washed his face and hands. He then poured water over his head and body. Then he moved aside and washed his feet. I handed him a garment, but he began to shake he moved aside and washed his feet. I handed him a garment, but he began to shake off water from his body. I mentioned it to Ibrahim. He said that they (companions) did not think there was any harm in using the garment (to wipe the water), but they disliked its use as a habit. Abu Dawud said: Musaddad said: I asked ‘Abd Allah b. Dawud whether they (the companions) disliked to make it a habit. He replied: it (the tradition) goes in a similar way and I found it in a similar way in this book of mine.  

وَضَعْتُ لِلنَّبِيِّ ﷺ غُسْلاً يَغْتَسِلُ بِهِ مِنَ الْجَنَابَةِ فَأَكْفَأَ الإِنَاءَ عَلَى يَدِهِ الْيُمْنَى فَغَسَلَهَا مَرَّتَيْنِ أَوْ ثَلاَثًا ثُمَّ صَبَّ عَلَى فَرْجِهِ فَغَسَلَ فَرْجَهُ بِشِمَالِهِ ثُمَّ ضَرَبَ بِيَدِهِ الأَرْضَ فَغَسَلَهَا ثُمَّ تَمَضْمَضَ وَاسْتَنْشَقَ وَغَسَلَ وَجْهَهُ وَيَدَيْهِ ثُمَّ صَبَّ عَلَى رَأْسِهِ وَجَسَدِهِ ثُمَّ تَنَحَّى نَاحِيَةً فَغَسَلَ رِجْلَيْهِ فَنَاوَلْتُهُ الْمِنْدِيلَ فَلَمْ يَأْخُذْهُ وَجَعَلَ يَنْفُضُ الْمَاءَ عَنْ جَسَدِهِ فَذَكَرْتُ ذَلِكَ لإِبْرَاهِيمَ فَقَالَ كَانُوا لاَ يَرَوْنَ بِالْمِنْدِيلِ بَأْسًا وَلَكِنْ كَانُوا يَكْرَهُونَ الْعَادَةَ  

when Ibn ‘Abbas took a bath because of sexual defilement, he poured (water) over his left hand with his right hand seven times. Once he forgot how many times he had poured (water). Therefore he asked me: how many times did I pour (water)? I do not know. He said : may you miss your mother! What prevented you from remembering it? He then performed ablution as he did for prayer and poured water over his skin (body). He then said: this is how the Messenger of Allah (May peace be upon him) purified (himself).  

أَنْ تَدْرِيَ ثُمَّ يَتَوَضَّأُ وُضُوءَهُ لِلصَّلاَةِ ثُمَّ يُفِيضُ عَلَى جِلْدِهِ الْمَاءَ ثُمَّ يَقُولُ هَكَذَا كَانَ رَسُولُ اللَّهِ ﷺ يَتَطَهَّرُ  

There were fifty prayers (obligatory in the beginning); and (in the beginning of Islam) washing seven times because of sexual defilement (was obligatory); and washing the urine from the cloth seven times (was obligatory). The Apostle of Allah ﷺ kept on praying to Allah until the number of prayers was reduced to five and washing because of sexual defilement was allowed only once and washing the urine from the clothe was also permitted only once.  

كَانَتِ الصَّلاَةُ خَمْسِينَ وَالْغُسْلُ مِنَ الْجَنَابَةِ سَبْعَ مِرَارٍ وَغَسْلُ الْبَوْلِ مِنَ الثَّوْبِ سَبْعَ مِرَارٍ فَلَمْ يَزَلْ رَسُولُ اللَّهِ ﷺ يَسْأَلُ حَتَّى جُعِلَتِ الصَّلاَةُ خَمْسًا وَالْغُسْلُ مِنَ الْجَنَابَةِ مَرَّةً وَغَسْلُ الْبَوْلِ مِنَ الثَّوْبِ مَرَّةً  

The Messenger of Allah ﷺ said: There is sexual defilement under every hair; so wash the hair and cleanse the skin. Abu Dawud said: The tradition narrated by Harith b. Wajih is rejected (Munkar). He is weak (in transmission).  

قَالَ رَسُولُ اللَّهِ ﷺ إِنَّ تَحْتَ كُلِّ شَعْرَةٍ جَنَابَةً فَاغْسِلُوا الشَّعْرَ وَأَنْقُوا الْبَشَرَ  

The Messenger of Allah ﷺ said: If anyone who is sexual defiled leaves a spot equal to the breadth of a hair without washing, such and such an amount of Hell-fire will have to be suffered for it. Ali said: On that account I treated my head (hair) as an enemy, meaning I cut my hair. He used to cut the hair (of his head). May Allah be pleased with him.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ مَنْ تَرَكَ مَوْضِعَ شَعْرَةٍ مِنْ جَنَابَةٍ لَمْ يَغْسِلْهَا فُعِلَ بِهِ كَذَا وَكَذَا مِنَ النَّارِ قَالَ عَلِيٌّ فَمِنْ ثَمَّ عَادَيْتُ رَأْسِي فَمِنْ ثَمَّ عَادَيْتُ رَأْسِي ثَلاَثًا وَكَانَ يَجِزُّ شَعْرَهُ