Surah 26. Ash-Shuara

38This only shows the extreme obstinacy and obduracy of Pharaoh, who even after witnessing a clear miracle and the testimony of the magicians on it, was still insisting that it was magic. But according to Al-A`raf: 123, Pharaoh said, "Indeed it was a plot you conspired in the capital to deprive the rightful owners of their power." Thus he tried to make the people believe that the magicians had yielded to Moses not because of the miracle but due to a conspiracy with Moses before they entered the contest, so that they might seize political power and enjoy its fruits together.

39This horrible threat was held out by Pharaoh to justify his thinking that the magicians had entered a conspiracy with Moses. He thought that the magicians, in order to save their lives, would confess the plot and thus the effect produced by their falling prostrate and believing in Moses in front of thousands of spectators would be gone.