Surah Al-Kahf 18:24

إِلَّآ أَن يَشَآءَ ٱللَّهُ ۚ وَٱذْكُر رَّبَّكَ إِذَا نَسِيتَ وَقُلْ عَسَىٰٓ أَن يَهْدِيَنِ رَبِّى لِأَقْرَبَ مِنْ هَـٰذَا رَشَدًا

Except [when adding], "If Allāh wills." And remember your Lord when you forget [it] and say, "Perhaps my Lord will guide me to what is nearer than this to right conduct."

Translation: Saheeh International

Tafsir

without adding ‘If God will’ in other words unless firmly adhering to the will of God exalted be He by saying ‘If God will’ inshā’a’Llāh. And remember your Lord that is remember His will making things conditional on it if you forget to make things conditional on it mentioning it after forgetting it is the equal in …

Excerpt from Tafsir al-Jalalayn, commentary on 18:24, via Quran.com. The reader has the full commentary and 9 more tafsirs.