أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ أَنْبَأَنَا يَزِيدُ، قَالَ أَنْبَأَنَا حُمَيْدٌ، عَنْ أَنَسٍ، قَالَ مَا كُنَّا نَشَاءُ أَنْ نَرَى رَسُولَ اللَّهِ صلى الله عليه وسلم فِي اللَّيْلِ مُصَلِّيًا إِلاَّ رَأَيْنَاهُ وَلاَ نَشَاءُ أَنْ نَرَاهُ نَائِمًا إِلاَّ رَأَيْنَاهُ .
It was narrated that Anas said: "Every time we wanted to see the Messenger of Allah (PBUH) praying at night we saw him, and every time we wanted to see him sleeping, we saw him." Translation Not Available
Book Ref: Sunan An Nisai Book 20 Hadith 1627
Web Ref: Sunan An Nisai Vol 2 Book 20 Hadith 1628