Mark 6:18

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

Leviticus 18:16

You shall not uncover the nakedness of your brother's wife. It is your brother's nakedness.

Leviticus 20:21

And if a man shall take his brother's wife, it is an unclean thing. He has uncovered his brother's nakedness; they shall be childless.

1 Kings 22:14

And Micaiah said, As Jehovah lives, what Jehovah says to me, that I will speak.

Ezekiel 3:18-19

When I say to the wicked, You shall surely die; and you do not give him warning, nor speak to warn the wicked from his wicked way, to save his life; the same wicked one shall die in his iniquity; but I will require his blood at your hand.

Matthew 14:3-4

For Herod had laid hold on John, and had bound him, and had put him in prison because of Herodias his brother Philip's wife.

Acts 20:26-27

Therefore I testify to you on this day that I am pure from the blood of all.

Acts 24:24-26

Then after certain days, when Felix came with his wife Drusilla, who was a Jewess, he sent for Paul and heard him concerning the 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
You shall not uncover the nakedness of your brother's wife. It is your brother's nakedness.
Leviticus 20:21
And if a man shall take his brother's wife, it is an unclean thing. He has uncovered his brother's nakedness; they shall be childless.
1 Kings 22:14
And Micaiah said, As Jehovah lives, what Jehovah says to me, that I will speak.
Ezekiel 3:18
When I say to the wicked, You shall surely die; and you do not give him warning, nor speak to warn the wicked from his wicked way, to save his life; the same wicked one shall die in his iniquity; but I will require his blood at your hand.
Matthew 14:3
For Herod had laid hold on John, and had bound him, and had put him in prison because of Herodias his brother Philip's wife.
Acts 20:26
Therefore I testify to you on this day that I am pure from the blood of all.
Acts 24:24
Then after certain days, when Felix came with his wife Drusilla, who was a Jewess, he sent for Paul and heard him concerning the faith in Christ.

General references

Matthew 14:4
For John said to him, It is not lawful for you to have her.
Luke 3:19
But Herod the tetrarch (being reproved by him on account of Herodias, his brother Philip's wife, and for all the evils which Herod had done)