Mark 6:18 For John had said unto Herod, it is not lawful for thee to have thy brother's wife. 19 Therefore Herodias had a quarrel against him, and she would have killed him; but she could not.
Another example of the indulgence of vengeance, and its bitter after-effects, took place when John the Baptist told Herod that it was wrong for him to have his brother’s wife. Herodias did not take kindly to that sermon, and she thirsted for revenge, until her mind was so obsessed with the craving to see John dead that she could not think of anything else. For the meantime, whilst she was restrained to some extent, she did the best that she could do, by having John put in prison.
Mark 6:17 For Herod himself had sent forth and laid hold upon John, and bound him in prison for the sake of Herodias, his brother Philip's wife, because he had married her…. Whenever persons desire to jail their opponents for merely speaking the truth, the thirst for revenge will not stop there and it would only be a matter of time before the opportunity to kill or maim her perceived foe, would come to fruition.
She brooded over the thought, and as she rolled it over in her mind day after day, it eventually became all absorbing, to the point where nothing else would give her more satisfaction than to see John dead. Thus, she waited, and waited until that opportune moment arrived, so that when a request was made by her daughter to ask for anything, even to half of the kingdom Herodias already had the answer ready and waiting.
Mark 6:21 And when a convenient day was come, Herod on his birthday made a supper to his lords, his high captains, and chief men of Galilee.
May God add His blessing to the study of His word. “Good night” and God bless!