Translation of the verse 21 from Surah At-Takwir : Number of verses 29 - - page 586 - Part 30.
Obeyed (by the angels), trustworthy there (in the heavens).
Obeyed there [in the heavens] and trustworthy.
(81:21) there he is obeyed *16 and held trustworthy. *17
*16) That is, he is the chief of the angels and alI angels work under his command.
*17) That is, he is not one who would tamper with Divine Revelation, but is so trustworthy that he conveys intact whatever he receives from God.
Source : At-Takwir Verse 21: Obeyed there [in the heavens] and trustworthy.