That he may know that they have conveyed the messages of their (72:28)

Almuntakhab Fi Tafsir Alquran Alkarim

But Allah would know whether His Messengers have proclaimed their Creators messages or they did not and He knows well what is within them and what is without; He has computed everything in a determinate number

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(72:28) so that He may know that they have delivered the messages of their Lord. *29 He encompasses in His knowledge their surroundings and keeps a count of all things.' *30

That he may know that they have conveyed the messages of their meaning

*29) This can have three meanings: (1) That the Messenger may know that the angels have delivered the messages of AIIah to him precisely and accurately; (2) that Allah may know that the angels have conveyed the messages of their Lord to His Messenger precisely and accurately; and (3) that AIIah may know that the Messenger has conveyed the messages of his Lord to His servants precisely and accurately. The words of the verse are comprehensive and may possibly imply all the three meanings. Besides, the verse also points out two other things: first, that the Messenger is given that knowledge of the unseen, which is necessary for him to perform his mission of Prophethood; second, that the angels keep watch that the Revelation reaches the Messenger safely and also that the Messenger conveys the messages of his Lord to His servants precisely and accurately.
*30) That is, Allah's power so encompasses the Messenger as well as the angels that if they swerve even a little from His will, they can be detected immediately. Moreover, a complete record has been kept of each letter of the messages sent down by Allah. The Messengers and the angels cannot dare add or subtract even a letter from them.

That he may know that they have conveyed the messages of their meaning in Urdu

تاکہ وہ جان لے کہ انہوں نے اپنے رب کے پیغامات پہنچا دیے، اور وہ اُن کے پورے ماحول کا احاطہ کیے ہوئے ہے اور ایک ایک چیز کو اس نے گن رکھا ہے"