19 Herodias had a grudge against John and was determined to have him killed.
Mark 6:19 Cross References - NSB
Genesis 39:17-20
1 Kings 21:20
20 Ahab said to Elijah: »Have you come face to face with me, O my enemy?« Elijah said: »I have come to you because you have given yourself up to do evil in the eyes of Jehovah.«
Ecclesiastes 7:9
9 Do not be quick in your spirit (mind) (figurative heart) to be angry. Anger rests in the bosom of fools.