Q 146: What is the textual proof of the Annual Pre-ordainment that takes place during Lailat Al-Qadr (the Night of Might)?
A--- Allah the Almighty says: {Therein (that night is decreed every matter of ordainments. As a Command (or this Qur'an or the Decree of every matter)from Us}. (Ad-Dukhan, 4, 5)
Ibn 'Abbas (May Allah be pleased with them) said: It is copied from AlLauh Al-Mahfuz on the Night of Might the matters of deaths, births, provisions, calamities, etc. for the whole (coming) year as decreed by Allah. Even names of the pilgrims: it is said: so and so will perform Hajj, and so and so will perform Hajj.
Reference: 200 FAQ On Muslims Belief - Shiekh Hafiz Ibn Ahmed Al Hakami