Surah Al-A'raf — Ayah 21 (7:21)
وَقَاسَمَهُمَآ إِنِّي لَكُمَا لَمِنَ ٱلنَّٰصِحِينَ ٢١
English translation (Saheeh International)
And he swore [by Allāh] to them, "Indeed, I am to you from among the sincere advisors."
Brief commentary
Satan swore to the two of them saying: 'By Allah I am to you both, O Adam and Eve, a sincere advisor in what I direct you to.'