It is narrated from Hazrat Aisha (may Allah be pleased with her) that when the last ten days of Ramadan began, the Prophet (peace and blessings be upon him) would stay awake at night, wake up his family, and tighten his waist belt.
Hadith Referenceمسند احمد / مسند النساء / 24377
Hadith Gradingحکم دارالسلام:حديث صحيح دون قوله: واعتزل أهله ، فحسن لغيره، وهذا إسناد ضعيف لضعف أبى معشر