The Cow - 2:118
"The ignorant said, "Should not Allah have spoken to us or a sign (miracle) have come to us?"Those before them had spoken like them. Their minds are alike. We show the miracles to those who believe."
Those before them who asked for such miracles:
The Women/4:153
"The people of the Book ask you to send down to them a Book from the sky. They had asked Moses for something greater than that and said, "Show us Allah physically". They were struck by lightning because of their transgression. They served the calf even after clear proofs came to them. Again We forgave them, and We gave Moses a clear authority."
The Cow/2:55
"You once said, "O Moses, we will not believe until we see Allah physically."You were struck by lightning while you were looking about."