It might have been the change of QIBLA that some of the Muslims as well as the pagans, who were enticed by the Jews, to ask the prophet irrational questions, as Moses was constantly harassed with foolish, offensive, and disingenuous questions by his own people. Hereby QURÄN gives a notice to Muslims not to follow the attitude taken by the Jews, and not to ask that sort of impertinent question, that they too, may come to a fate similar to that of the Israelites. Of course, we should not mistake rational or scientific questions which are asked for real instruction, with the questions for creating excuses and objections - Questions for real instruction and increasing knowledge is not prohibited, but rather encouraged and recommended. Even it is not forbidden in Islam to ask a prophet for miracle, in order to improve one's faith or to make someone a convert, because such are the ways of understanding and comprehensions.