1 Kings 21:9
9. Proclaim a fast, &c.—Those obsequious and unprincipled magistrates did according to orders. Pretending that a heavy guilt lay on one, or some unknown party, who was charged with blaspheming God and the king and that Ahab was threatening vengeance on the whole city unless the culprit were discovered and punished, they assembled the people to observe a solemn fast. Fasts were commanded on extraordinary occasions affecting the public interests of the state (2Ch 20:3; Ezr 8:21; Joe 1:14; 2:15; Jon 3:5). The wicked authorities of Jezreel, by proclaiming the fast, wished to give an external appearance of justice to their proceedings and convey an impression among the people that Naboth's crime amounted to treason against the king's life.
set Naboth on high—During a trial the panel, or accused person, was placed on a high seat, in the presence of all the court; but as the guilty person was supposed to be unknown, the setting of Naboth on high among the people must have been owing to his being among the distinguished men of the place. 1 Kings 21:12-13
13. there came in two men—worthless fellows who had been bribed to swear a falsehood. The law required two witnesses in capital offenses (De 17:6; 19:15; Nu 35:30; Mt 26:60). Cursing God and cursing the king are mentioned in the law (Ex 22:28) as offenses closely connected, the king of Israel being the earthly representative of God in His kingdom.
they carried him forth out of the city, and stoned him—The law, which forbade cursing the rulers of the people, does not specify the penalty for this offense but either usage had sanctioned or the authorities of Jezreel had originated stoning as the proper punishment. It was always inflicted out of the city (Ac 7:58).