لَا يَعْصُونَ اللَّهَ مَا أَمَرَهُمْ وَيَفْعَلُونَ مَا يُؤْمَرُونَ
They do not disobey God in what He commands, and do what they are ordered. (Al-Taḥrīm 66:6)
The verse makes two mutually reinforcing claims: the absence of disobedience and the performance of what is commanded. The first negates violating the command; the second affirms carrying out the instructed act.
These are not useless repetitions. Refraining from a prohibited act and positively fulfilling an assignment are distinct modes of obedience. The verse is a principal scriptural argument for angelic protection from sin.