Ummul Mu’mineen, Sayyidatina Aisha (RA) has reported, “With the start of the last ten days of Ramadan, Nabi (Sallallahu Alaihi Wasallam) used to tighten his waist belt & used to pray the whole night, & used to keep his family awake for the prayers. (Bukhari)
The last ten days & nights of Ramadan are the most blessed. Therefore we should exert themselves in worship even more during each of the last 10 days and nights, particularly the last ten odd numbered nights: 21, 23, 25, 27, 29.
By worshipping the last 10 nights we would be most likely to catch the night of power & gain the reward of over 83 years of worship! Subhanallah thats longer than the average human life expectancy!