الآية رقم (183) - وَأُمْلِي لَهُمْ إِنَّ كَيْدِي مَتِينٌ

(183) - (And I will give them time. Indeed, my plan is firm.)

( وَأُمْلِي ) (And I will give them time): Allah (swt) does not take them to task right away, rather He delays and postpones.

(to plan something) is the act of planning or arranging something in a subtle manner.

(Firm) means powerful or strong.

Allah (swt) grants them respite, then His (swt) subtle scheme is  exceedingly firm, and no one can overcome it.