Like the ancient prophet Elijah, who rebuked the transgressions of Ahab and Jezebel (1 Kings 21:21, 23), John confronted Herod, declaring: “It is not lawful for you to have your brother’s wife” (Mark 6:18). Herod’s brother, Herod Philip, who lived in Rome as a private citizen, was legally wed to Herodias, but she abandoned him out of ambition and, in defiance of the law forbidding a brother from marrying his sibling’s wife while he was still living (Deuteronomy 25:5-10), became the wife of Herod Antipas. This immoral woman sought to have John executed swiftly for denouncing her illicit union, but she only succeeded in persuading Herod Antipas to imprison him. Herod hesitated to execute the bloody command of Herodias out of fear of the populace (Matthew 14:5), being aware that John was a righteous and holy man (Mark 6:20), whose death might invite divine retribution on the perpetrators. Because of this terror, Herod valued his captive, treated him with care, and derived pleasure from listening to him (v. 20). Such regard for the prisoner explains why John was afforded a degree of freedom even in confinement: he maintained unhindered contact with his disciples, receiving updates about Christ's works and sending messages to Him (Matthew 11:2).
As the proclamation of the Gospel expanded, John the Forerunner and Baptist of Christ, confined in prison, met a martyr’s end. Herodias, incited by John's denunciation of her illicit marriage, nurtured a deep-seated resentment towards the prophet. She realized that if Herod heeded John's admonitions and divorced her, she would lose her status and influence, prompting her desire to eliminate this witness of truth. Unable to enact her vengeance alone, she schemed insidiously, manipulating her weak, volatile, and capricious husband. Herod, initially respectful of John as a holy man and receptive to his counsel, ultimately succumbed to the pressure to sacrifice him. However, fearing the backlash of the people who regarded John as a prophet, Herod postponed the grim execution; Herodias, meanwhile, awaited the chance to exact her revenge.
Antipas had long been aware of Christ’s name and actions due to the widespread rumors circulating about Him (Matthew 14:1; Mark 6:14; Luke 9:7). Confused, he questioned, “Who is this about whom I hear such things?” (Luke 9:9) and speculated that this miracle worker might be the risen John the Baptist whom he had beheaded (Matthew 14:2; Mark 6:14, 16). In his quest for certainty, he sought an opportunity to encounter Jesus (Luke 9:9).