Al-Jinn 72:28

LiyaAAlama an qad ablaghoo risalatirabbihim waahata bima ladayhim waahsa kullashay-in AAadada

That he [i.e., Muḥammad (ﷺ)] may know that they have conveyed the messages of their Lord; and He has encompassed whatever is with them and has enumerated all things in number.

so that He knows that they (angels) have conveyed the messages of their Lord. And He has encompassed all that is with them, and has comprehensive knowledge of every thing by numbers.