(Swaad) 38 : 74
إِلَّا إِبْلِيسَ اسْتَكْبَرَ وَكَانَ مِنَ الْكَافِرِينَ
Except Iblis, he acted arrogantly, and he was among the disbelievers.
“Angels, all of them fell in prostration except Iblis” mentioned in the verses does not mean that Iblis belongs to Angels who are the believers. Not to misunderstand so, it is especially told in this verse and verse 2: 34 that Iblis was among the disbelievers. And in verse 18: 50 it is told that Iblis belonged to sprites (Jinn). Disbelievers are coming only from mankind and Sprites. Angels are bound to do what they are commanded and so no disobedience will happen from them as told in verse 66: 6. See explanation 2: 34; 6: 112; 59: 16-17; 76: 3-4.