Mark 6:18

For John had said unto 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 the LORD lives, what the LORD says unto me, that will I speak.

Ezekiel 3:18-19

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

Matthew 14:3-4

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

Acts 20:26-27

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

Acts 24:24-26

And 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 the LORD lives, what the LORD says unto me, that will I speak.
Ezekiel 3:18
When I say unto the wicked, You shall surely die; and you give him not warning, nor speak to warn the wicked from his wicked way, to save his life; the same wicked man shall die in his iniquity; but his blood will I require at your hand.
Matthew 14:3
For Herod had laid hold on John, and bound him, and put him in prison for Herodias' sake, his brother Philip's wife.
Acts 20:26
Therefore I testify to you this day, that I am pure from the blood of all men.
Acts 24:24
And 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 unto him, It is not lawful for you to have her.
Luke 3:19
But Herod the tetrarch, being reproved by him for Herodias his brother Philip's wife, and for all the evils which Herod had done,