Dr. Mustafa Khattab, the Clear Quran - Surah Al-Kahf, ayah 23

Translation of Surah Al-Kahf, ayah 23 (18:23)

وَلَا تَقُولَنَّ لِشَاْيۡءٍ إِنِّي فَاعِلٞ ذَٰلِكَ غَدًا ٢٣
And never say of anything, “I will definitely do this tomorrow,”