Hadith
حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، قَالَ سَمِعْتُ ابْنَ عُمَرَ، يَقُولُ سَأَلَ عُمَرُ رَضِيَ اللَّهُ عَنْهُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ تُصِيبُنِي الْجَنَابَةُ مِنْ اللَّيْلِ فَمَا أَصْنَعُ قَالَ اغْسِلْ ذَكَرَكَ ثُمَّ تَوَضَّأْ ثُمَّ ارْقُدْ.
Narrated by It was narrated that `Abdullah bin Deenar said:
I heard Ibn `Umar say: `Umar (...) asked the Messenger of Allah (ﷺ) : If I become junub at night; what should I do? He said: `Wash your private part then do wudoo’ then go to sleep.”
Musnad Ahmad 36503·Also available on sunnah.com·