It is narrated from Sayyiduna Abu Sa'id (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) said: "When any one of you intends to have intercourse again, he should perform ablution like the ablution for prayer, then have intercourse again before performing ghusl (full ritual bath)."
Hadith Referenceصحيح ابن خزيمه / جماع أبواب فضول التطهير والاستحباب من غير إيجاب / 220