"And thou didst a deed of thine which (thou knowest) thou didst, and thou art an ungrateful (wretch)!" Ash-Shu'ara 26:19 ⧉
Tafsir:
One chosen by God to represent Him is in every way under His protection. Moreover, he is given some special signs which indicate clearly that his mission is an affair of God. But, in spite of that, man has gone so far in transgression as not to admit this. The Quran does not specify the details of the demand made by Moses on Pharaoh with regard to the Children of Israel. But the Torah elaborates upon the subject in the following sections: Exodus 4/18, 5/1 , 8/25-27 . According to the description in the Bible, it appears that this journey of Moses was not for the purpose of migration but for instruction. In Egypt, the cow was considered holy. Due to this centuries-old tradition, even the the Children of Israel had been influenced by this belief. Now, Moses wanted to take the Children of Israel out of the polytheistic atmosphere of Egypt for a few days, keep them in a pure atmosphere and re-educate them.