Tafsir of Al-Kahf 18:72

He (Al-Khidr) said: Did I not tell you, that you would not be able to have patience with me! meaning, `this thing that I did deliberately is one of the things I told you not to denounce me for, because you do not know the full story, and there is a reason and purpose for it that you do not know about.'

قال ﻻ تواخذني بما نسيت وﻻ ترهقني من أمري عسرا