18:23
Al-Kahf 23
Surah Al-Kahf (الكهف), verse 23 — reference 18:23. Arabic text with optional translation and free audio on Al-Qalam.
وَلَا تَقُولَنَّ لِشَا۟ىْءٍ إِنِّى فَاعِلٌ ذَٰلِكَ غَدًا
walā taqūlanna lishāy'in innī fāʿilun dhālika ghadan
And never say of anything, "Indeed, I will do that tomorrow,"