Moses came to Pharaoh and his council with clear signs 28:36-43
28:36 And when Moses came to them (Pharaoh and his council) with Our clear signs, they said, 'This is nothing but forged sorcery. We have never heard of this among our fathers, the ancients.'
28:38 'Assembly,' said Pharaoh, 'I do not know that you have any god except me!' 'O Haman, kindle a fire upon clay and make me a tower so that I can climb to see the God of Moses, I think that he is one of the liars!'
28:43 And We gave Moses the Book, after We had destroyed the former generations, to be reflections for people and a guidance, and a mercy in order that they might remember.