What does the Bible say about John the Baptist's imprisonment?

The Bible reveals that John the Baptist was imprisoned by King Herod because John condemned Herod's marriage to his brother's wife, which was according to Jewish law considered unlawful. Herodias, Herod's wife, desired John's death due to his outspoken rebuke. Although Herod respected John and feared the truth he spoke, he ultimately succumbed to the pressure from Herodias and executed John after a fateful oath was made during a banquet. This account highlights the dangers of speaking God's truth boldly amidst political and personal complication.