Az-Zukhruf 43:80

Am yahsaboona anna lanasmaAAu sirrahum wanajwahum bala warusulunaladayhim yaktuboon

Or do they think that We hear not their secrets and their private conversations? Yes, [We do], and Our messengers [i.e., angels] are with them recording.

Do they think that We do not hear their secrets and their whispers? Yes of course, Our messengers (angels) are with them who record (whatever they plan).