Sayyiduna Ali (may Allah be pleased with him) narrates that when the last ten days of Ramadan would begin, the Prophet (peace and blessings be upon him) would wake up his family and tighten his waist-wrapper.
Hadith Referenceمسند احمد / مسند الخلفاء الراشدين / 1105
Hadith Gradingحکم دارالسلام:إسناده حسن، وهو مكرر ما قبله