Verse 253-262 of Baqarah by Imam Faisal.
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وَلَا تَقُولَنَّ لِشَيْءٍ إِنِّي فَاعِلٌ ذَلِكَ غَدًا
And never say of anything, “I shall do such and such thing tomorrow.”
إِلَّا أَن يَشَاء اللَّهُ وَاذْكُر رَّبَّكَ إِذَا نَسِيتَ وَقُلْ عَسَى أَن يَهْدِيَنِ رَبِّي لِأَقْرَبَ مِنْ هَذَا رَشَدًا
Except (with the saying), “If Allah will!” And remember your Lord when you forget and say: “It may be that my Lord guides me unto a nearer way of truth than this.”
(Al-Kahf 18:23-24)