Sahih Muslim Book - 3, Hadith - 825

و حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ وَأَبُو كُرَيْبٍ قَالَا حَدَّثَنَا وَكِيعٌ عَنْ مِسْعَرٍ عَنْ وَاصِلٍ عَنْ أَبِي وَائِلٍ عَنْ حُذَيْفَةَ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَقِيَهُ وَهُوَ جُنُبٌ فَحَادَ عَنْهُ فَاغْتَسَلَ ثُمَّ جَاءَ فَقَالَ كُنْتُ جُنُبًا قَالَ إِنَّ الْمُسْلِمَ لَا يَنْجُسُ.

It was narrated from Hudhaifah that the Messenger of Allah (s.a.w) met him while he was sexually impure, so he slipped away and performed Ghusl, then he came back and said: "I was sexually impure." He said: "The Muslim does not become impure."