The Book of Purification and its Sunnah
1/100. Chapter:
When a person who is sexually impure wants to have intercourse again, he should perform ablution
Sunan Ibn Majah
حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ الْمَلِكِ بْنِ أَبِي الشَّوَارِبِ، حَدَّثَنَا عَبْدُ الْوَاحِدِ بْنُ زِيَادٍ، حَدَّثَنَا عَاصِمٌ الأَحْوَلُ، عَنْ أَبِي الْمُتَوَكِّلِ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " إِذَا أَتَى أَحَدُكُمْ أَهْلَهُ ثُمَّ أَرَادَ أَنْ يَعُودَ فَلْيَتَوَضَّأْ " .
It was narrated that Abu Sa'eed said: "The Messenger of Allah said: 'If anyone of you has intercourse with his wife, then he wants to do it again, let him perform ablution.'"
Reference : Sunan Ibn Majah 587In-book reference : Book 1, Hadith 321English translation : Vol. 1, Book 1, Hadith 587