Leviticus 24:14
14. Bring forth him that hath cursed without the camp—All executions took place without the camp; and this arrangement probably originated in the idea that, as the Israelites were to be "a holy people" [De 7:6; 14:2, 21; 26:19; 28:9], all flagrant offenders should be thrust out of their society.
let all that heard him lay their hands upon his head, &c.—The imposition of hands formed a public and solemn testimony against the crime, and at the same time made the punishment legal. Numbers 15:35
35, 36. The Lord said unto Moses, The man shall be surely put to death—The Lord was King, as well as God of Israel, and the offense being a violation of the law of the realm, the Sovereign Judge gave orders that this man should be put to death; and, moreover, He required the whole congregation unite in executing the fatal sentence.
1 Kings 21:13
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).