Matthew 14:6
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.
Mark 6:21-23
Then an ideal opportunity arose [i.e., for Herodias to do away with John] when Herod gave a dinner on his birthday for his influential friends, military commanders and the prominent officials of Galilee.
Matthew 22:24
"Teacher, Moses said [in Deut. 25:5] that when a man dies without having had any children, his brother must marry his widow and father children by her, who would [then] be considered his [dead] brother's.
Mark 6:17
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 6:19
Now [because of this] Herodias had a grudge against John and wanted to kill him, but had not been able to.
Luke 3:19
But because he had rebuked Herod, the tetrarch, for [marrying] his brother's wife Herodias, and for all the other bad things he had done,