حَدَّثَنَا الْفَضْلُ بْنُ دُكَيْنٍ حَدَّثَنَا سُفْيَانُ عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ سَمِعْتُ ابْنَ عُمَرَ قَالَ سَأَلَ عُمَرُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ تُصِيبُنِي الْجَنَابَةُ مِنْ اللَّيْلِ فَأَمَرَهُ أَنْ يَغْسِلَ ذَكَرَهُ وَيَتَوَضَّأَ وَيَرْقُدَ
مسند امام احمد بن حنبل · Hadith 5967
It was narrated from 'Abdullah ibn Dinar: I heard Ibn 'Umar say: 'Umar asked the Messenger of Allah (PBUH): (Sometimes) I become junub at night. He instructed him to wash his private part, then do wudoo', then go to sleep.
Sanad
حَدَّثَنَا الْفَضْلُ بْنُ دُكَيْنٍ حَدَّثَنَا سُفْيَانُ عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ سَمِعْتُ ابْنَ عُمَرَ