Mark 6:18

John said to Herod: It is not lawful for you to have your brother's wife.

Leviticus 18:16

Do not have sexual intercourse with your sister-in-law. She is your brother's wife.

Leviticus 20:21

He who marries his brother's wife violates his brother's marriage and does an unclean thing. That man and woman will have no children.

1 Kings 22:14

Micaiah answered: By the living God Jehovah I promise that I will say what he tells me to say!

Ezekiel 3:18-19

When I tell a wicked man that he will surely die, but you do not warn him or speak out so that he can change his wicked way in order to save his life; that wicked man will die because of his sin. I will hold you responsible for his death.

Matthew 14:3-4

Herod locked John in prison to please Herodias, his brother Philip's wife.

Acts 20:26-27

I declare to you today that I am innocent of the blood of all men.

Acts 24:24-26

A few days later Felix arrived with Drusilla his wife, who was a Jewess. He sent for Paul and listened to him concerning faith in Christ.

Treasury of Scripture Knowledge

Summary

For John had said unto Herod, It is not lawful for thee to have thy brother's wife.

General references

Bible References

It is

Leviticus 18:16
Do not have sexual intercourse with your sister-in-law. She is your brother's wife.
Leviticus 20:21
He who marries his brother's wife violates his brother's marriage and does an unclean thing. That man and woman will have no children.
1 Kings 22:14
Micaiah answered: By the living God Jehovah I promise that I will say what he tells me to say!
Ezekiel 3:18
When I tell a wicked man that he will surely die, but you do not warn him or speak out so that he can change his wicked way in order to save his life; that wicked man will die because of his sin. I will hold you responsible for his death.
Matthew 14:3
Herod locked John in prison to please Herodias, his brother Philip's wife.
Acts 20:26
I declare to you today that I am innocent of the blood of all men.
Acts 24:24
A few days later Felix arrived with Drusilla his wife, who was a Jewess. He sent for Paul and listened to him concerning faith in Christ.

General references

Matthew 14:4
For John had said to him: It is not lawful for you to have her.
Luke 3:19
John reproved Herod the tetrarch for all the evil things he had done for he took his brother Herodias' wife.