Virtues of enlivening the following blessed nights

 Nabi (sallallahu ‘alaihi wasallam) has mentioned that Paradise becomes waajib for that person who worships Allah Ta‘ala on five nights. i.e. the night of Tarwiyah (8th of Zul Hijjah), the night of Arafah (9th of Zul Hijjah), the night of Nahr (10th of Zul Hijjah), the night of Eidul Fitr and the night of the 15th of Sha’baan.

Hazrat Muaaz bin Jabal (radhiyallahu ‘anhu) reports that Rasulullah (sallallahu ‘alaihi wasallam) said, “The one who enlivens five nights of the year with ibaadah, Jannah becomes compulsory for him. (These five nights are) the night of Tarwiyah (8th of Zul Hijjah), the night of Arafah (9th of Zul Hijjah), the night of Nahr (10th of Zul Hijjah), the night of Eidul Fitr and the night of the 15th of Sha’baan. 
    (الترغيب والترهيب، تاريخ ابن عساكر)