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With the start of the last ten days of Ramadan, the Prophet (ﷺ) used to tighten his waist belt (i.e. work hard) and used to pray all the night, and used to keep his family awake for the prayers.

When the last ten days of Ramadan came, the Prophet (ﷺ) kept vigil and prayed during the whole night, and tied the wrapper tightly, and awakened his family (to pray during the night). Abu Dawud said: The name of Abu Ya'fur is 'Abd al-Rahma

"Aishah may Allah (SWT) be pleased with her, said: ' When the last ten nights of Ramadan began, the Messenger of Allah (ﷺ) stayed up at night (for prayer) and he woke his family up and tightened his waist-wrap.'"