الحجر · Verse 31 / 99 · Page 263
إِلَّا إِبْلِيسَ أَبَى أَن يَكُونَ مَعَ السَّاجِدِينَ
Illaaa ibleesa abaaa ai yakoona ma'as saajideen
Except Iblees, he refused to be with those who prostrated.
As for Iblis, who was with the angels but was not one himself, refused to prostrate to Adam along with the angels.
Source: Al-Mukhtasar Tafsir — Tafsir Center for Quranic Studies.
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