John the Baptist rebuking Herod

Question

When John the Baptist told Herod "It is not lawful for thee to have thy brother’s wife." (Mark 6 v16) was he rebuking him for adultery or for incest?
Andrew.

Answer

Hi Andrew,

He was rebuking him for adultery for he had a relationship with Herodias who was his sister-in-law, his brother Philip's wife. (Mark 6:17)

Pastor Vergunst