Observing the blessed days Allāh ﷻ has given as a present to us brings real reward that lasts forever. The 8th and 9th of Dhū l-Ḥijjah are such days. Fast these days, read 1000x Ikhlāṣ, 1000x lā ilāha illā Llāh Muḥammadur Rasūlu Llāh and 1000x ṣalawāt. Read Qur’ān, if you can. As much you can do Allāh ﷺ will reward you, in shā’a Llāh.