He asked the Prophet ﷺ about a man who is intimate with his wife but does not ejaculate.He said, "When one of you experiences that, let him sprinkle his private part," meaning let him wash it, "and perform ablution."
حدثنا محمد بن بشار حدثنا عثمان بن عمر حدثنا مالك بن أنس عن سالم أبي النضر عن سليمان بن يسار
أنه سأل النبي ﷺ عن الرجل يدنو من امرأته فلا ينزل قال إذا وجد أحدكم ذلك فلينضح فرجه يعني ليغسله ويتوضأ
[Sahih] Reported by Abu Dawud, Purification, chapter on madhi (prostatic fluid), hadith no. 307, from the hadith of Malik through this same chain, and Ibn Khuzayma and Ibn Hibban graded it sahih. It also has another route in Muslim and elsewhere.