´It was narrated from Busrah bint Safwan that the Prophet (ﷺ) said:` "If any one of you touches his private part with his hand, let him perform Wudu'."
Hadith ReferenceSunan an-Nasa'i / The Book of Ghusl and Tayammum / Hadith: 446
Hadith Gradingالألبانی:صحيح الإسناد | زبیر علی زئی:صحيح