﴿ وَقَالَ فِرْعَوْنُ يَٰهَٰمَٰنُ ٱبْنِ لِى صَرْحًۭا لَّعَلِّىٓ أَبْلُغُ ٱلْأَسْبَٰبَ ﴾

“But Pharaoh said: “O Haman! Build me a lofty tower, that haply I may attain to the [right] means”

What Pharaoh said to his minister, Haman, was not said seriously, but by way of a timely stratagem. He saw that the cogent and reasonable words of the true believer were having an effect on the people. So, he wanted to raise a frivolous point in order that Moses’ call should not become the topic of serious discussion but appear rather as a mere triviality.