حَدَّثَنَا حُسَيْنُ بْنُ مُحَمَّدٍ حَدَّثَنَا أَيُّوبُ بْنُ جَابِرٍ عَنْ عَبْدِ اللَّهِ يَعْنِي ابْنَ عِصْمَةَ عَنِ ابْنِ عُمَرَ قَالَ كَانَتْ الصَّلَاةُ خَمْسِينَ وَالْغُسْلُ مِنْ الْجَنَابَةِ سَبْعَ مِرَارٍ وَالْغُسْلُ مِنْ الْبَوْلِ سَبْعَ مِرَارٍ فَلَمْ يَزَلْ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَسْأَلُ حَتَّى جُعِلَتْ الصَّلَاةُ خَمْسًا وَالْغُسْلُ مِنْ الْجَنَابَةِ مَرَّةً وَالْغُسْلُ مِنْ الْبَوْلِ مَرَّةً
مسند امام احمد بن حنبل · Hadith 5884
It was narrated that Ibn. 'Umar said: The prayer was fifty Umar said: The prayer was fifty and ghusl from janaabah was seven times, and ghusl from urination was seven times, then the Messenger of Allah (PBUH) kept asking until prayer was made five, ghusl from janaabah was made one and ghusl from urination was made one.
Sanad
حَدَّثَنَا حُسَيْنُ بْنُ مُحَمَّدٍ حَدَّثَنَا أَيُّوبُ بْنُ جَابِرٍ عَنْ عَبْدِ اللَّهِ يَعْنِي ابْنَ عِصْمَةَ عَنِ ابْنِ عُمَرَ