Zayd bin Khalid reported,

He informed him that he asked Uthman bin Affan , "Tell me, if a man has intercourse with his wife but does not ejaculate, what should he do?"Uthman replied, "He should perform ablution as he does for prayer and wash his private part."Uthman said, "I heard this from the Messenger of Allah ﷺ."So I asked Ali, Zubayr, Talha, and Ubayy bin Kaab about this, and they all instructed him to do the same.

حدثنا سعد بن حفص حدثنا شيبان عن يحيى عن أبي سلمة أن عطاء بن يسار أخبره أن

زيد بن خالد

أخبره أنه سأل عثمان بن عفان رضي الله عنه قلت أرأيت إذا جامع فلم يمن قال عثمان يتوضأ كما يتوضأ للصلاة ويغسل ذكره قال عثمان سمعته من رسول الله ﷺ فسألت عن ذلك عليا والزبير وطلحة وأبي بن كعب رضي الله عنهم فأمروه بذلك