"Ask the Children of Israel how many clear signs We gave them." Al-Hasan's interpretation: Meaning what Allah saved them from regarding the kin of Pharaoh, the shading over them with clouds, and other such things. We gave them clear signs of guidance, making clear to them the guidance versus disbelief. "And whoever alters the favor of Allah after it has come to him"—He says: They altered that, and they adopted Judaism and Christianity—"then indeed, Allah is severe in penalty." He informs that His retribution will be severe against the Jews and the Christians who altered the religion of Allah.