Allāh makes an oath by the ten nights (89:2) these are the first ten nights of Dhū l-Ḥijjah. Who can fast these days gets much reward. Who can fast the 8th and 9th is forgiven the sins of the year before and the year after. Who can fast the 9th day is given the reward of S. Ayyūb (as). The animal sacrifice of ‘Īd is required and must be done with mercy.