سورة الكهف

وَلَا تَقُولَنَّ لِشَيْءٍ إِنِّي فَاعِلٌ ذَٰلِكَ غَدًا ﴿٢٣﴾

Surah al-Kahf

23. And never say about anything, “I will do that tomorrow.”