17 For it was Herod himself who had sent for John and had him arrested and chained up in prison. He did this to please Herodias, who was [i.e., had been] his brother Philip’s wife, but whom Herod had married.
Mark 6:17 Cross References - AUV
Matthew 4:12
12 Now when Jesus heard that John had been arrested, He left [the province of Judea] and went to Galilee.
Matthew 11:2
2 Now while still in prison, John [the Immerser] heard about the things Christ was doing, [so] he sent [word] through his disciples
Matthew 14:3-12
3 For Herod had arrested John and had him chained and put in prison in order to please Herodias, his brother Philip’s wife.
4 For John had said to him, “It is not lawful for you to be married to her.”
5 Now Herod wanted to have him put to death, [but hesitated], fearing the crowd, because they considered John to be a prophet.
6 But when Herod’s birthday came, Herodias’ daughter [Note: According to Josephus her name was Salome], pleased him by [her sensual] dancing in front of the party guests.
7 [Herod was so pleased with her performance that] he promised, with an oath, to give her whatever she asked for [i.e., with limitations. See Mark 6:23].
8 Her mother persuaded her to say, “Give me the head of John, the Immerser, here on this [large] platter.”
9 Now King Herod became very distressed [over such a gruesome request]; but because he had [promised with] oaths and [to look good in front of] his party guests, he ordered John’s head to be given [to her].
10 So, he sent [word to his officers] and had John decapitated in the prison.
11 His head was brought on a [large] platter and given to the young woman [i.e., Salome], and she took it to her mother [i.e., Herodias].
12 Jesus’ disciples came and took the body and buried it; then they went and told Jesus [all about the incident].
Luke 3:1
1 Now it was the fifteenth year of the reign of Tiberius Caesar. Pontius Pilate was governor of Judea, Herod was ruler of Galilee, his brother Philip was ruler of the regions of Ituraea and Trachonitus [Note: These two men were sons of Herod the Great (See Matt. 2:1) and ruled over provinces east of the Jordan River] and Lysanias was ruler of Abilene [Note: This was a province just north of the two previously mentioned ones].