פירוש על מלכים א 21:13

Navos cursed. A euphemism for curse. And Targum [Yonoson rendered], Navos blasphemed against God and cursed the king.²Thus making him liable to death for either offense. The reason for mentioning both offenses is to arouse the people’s anger against Navos and thereby he would be executed quickly. See Maseches Sanhedrin 48b.—Metzudas Dovid