(3) Purification
كتاب الطهارة
(7b) Chapter: Associating with one who is defiled, and what is permitted - Section 2
(6) باب مخالطة الجنب - الفصل الثاني
Mishkat al-Masabih 459 
‘A'isha said, “God’s messenger used to wash because of sexual defilement, then warm himself against me before I washed.” Ibn Majah transmitted it, and Tirmidhi transmitted something similar. In Sharh as-sunna it is given with the wording in al-Masabih.
وَعَنْ عَائِشَةَ قَالَتْ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَغْتَسِلُ مِنَ الْجَنَابَةِ ثُمَّ يَسْتَدْفِئُ بِي قَبْلَ أَنْ أَغْتَسِلَ. رَوَاهُ ابْنُ مَاجَه وروى التِّرْمِذِيّ نَحوه
 ضَعِيف  (الألباني)حكم :
Reference : Mishkat al-Masabih 459
In-book reference : Book 3, Hadith 163