Sahih Muslim
347.01

Zaid b. Khalid al-Jubani reported that he askad Uthman b. 'Affan:What is your opinion about the man who has sexual intercourse with his wife, but does not experience orgasm? Uthman said: He should perform ablution as he does for prayer, and wash his organ. 'Uthmin also said: I have heard it from the Messenger of Allah (ﷺ)

347.02

Abu Ayyub reported that he had heard like this from the Messenger of Allah (ﷺ)