It was narrated from Abu Sa'eed that the Prophet (ﷺ) said:
"When any one of you a wants to return (to have intercourse again), let him perform Wudu'." (JA)
English reference (JA): Vol. 1, Book 1, Hadith 263 (JA)
Arabic reference (JA): Book 1, Hadith 264 (JA)