He (Musa) said:Call me not to account for what I forgot, and be not hard upon me for my affair (with you).meaning, `do not be harsh with me.'Hence it says in the Hadith quoted above from the Messenger of Allah:كَانَتِ الاْاُولَى مِنْ مُوسَى نِسْيَانًاIn the first instance, Musa asked Al-Khidr because he had forgotten his promise