The Prophet ﷺ used to wash his private area three times. Ibn Umar said, "We did the same and found it to be both a remedy and a means of purification."Abu al-Hasan bin Salama said, Abu Hatim and Ibrahim bin Sulayman al-Wasiti narrated to us, both saying, Abu Naeem narrated to us, Sharik narrated to us something similar.
حدثنا علي بن محمد حدثنا وكيع عن شريك عن جابر عن زيد العمي عن أبي الصديق الناجي
أن النبي ﷺ كان يغسل مقعدته ثلاثا قال ابن عمر فعلناه فوجدناه دواء وطهورا قال أبو الحسن بن سلمة حدثنا أبو حاتم وإبراهيم بن سليمان الواسطي قالا حدثنا أبو نعيم حدثنا شريك نحوه
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Its isnad is very daif. Busiri said, "This isnad contains Zayd Ammi, who is daif ... and Jabir, who is daif and a Rafidi, as stated in Taqrib." Ibn Rajab said, "Jabir Jafi was declared daif by most scholars."