Dr. Mustafa Khattab, the Clear Quran - Surah Al-Inshiqaq, ayah 16

Translation of Surah Al-Inshiqaq, ayah 16 (84:16)

فَلَآ أُقۡسِمُ بِٱلشَّفَقِ ١٦
So, I do swear by the twilight!