أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ يَزِيدَ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنْ أَبِي يَعْفُورٍ، عَنْ مُسْلِمٍ، عَنْ مَسْرُوقٍ، قَالَ قَالَتْ عَائِشَةُ رضى الله عنها كَانَ إِذَا دَخَلَتِ الْعَشْرُ أَحْيَا رَسُولُ اللَّهِ صلى الله عليه وسلم اللَّيْلَ وَأَيْقَظَ أَهْلَهُ وَشَدَّ الْمِئْزَرَ ‏.‏

It was narrated that Masruq said: "Aishah may Allah (SWT) be pleased with her, said:' When the last ten nights of Ramadan began, the Messenger of Allah (PBUH) stayed up at night (for prayer) and he woke his family up and tightened his waist-wrap.'" Translation Not Available

Book Ref: Sunan An Nisai Book 20 Hadith 1639
Web Ref:  Sunan An Nisai Vol 2 Book 20 Hadith 1640