Surah At-Takwir 81:21
مُّطَاعٍ ثَمَّ أَمِينٍ
Obeyed there [in the heavens] and trustworthy.
Translation: Saheeh International
Tafsir
obeyed there the angels obey him in the heavens trustworthy with the Revelation.
Excerpt from Tafsir al-Jalalayn, commentary on 81:21, via Quran.com. The reader has the full commentary and 9 more tafsirs.