That he 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.
The Saheeh International Quran Translation
لِّيَعْلَمَ أَن قَدْ أَبْلَغُوا۟ رِسَٰلَٰتِ رَبِّهِمْ وَأَحَاطَ بِمَا لَدَيْهِمْ وَأَحْصَىٰ كُلَّ شَىْءٍ عَدَدًۢاThat he 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.