Mark 6:18

For John had been saying to Herod, "It is not permitted for you to have your brother's wife."

Leviticus 18:16

You must not expose the nakedness of your brother's wife; she [is] your brother's nakedness.

Leviticus 20:21

As for a man who marries his brother's wife, it [is] an abomination; he has exposed his brother's nakedness--they shall be childless.

1 Kings 22:14

Then Micaiah said, "{As Yahweh lives}, surely only as Yahweh speaks to me, that will I speak."

Ezekiel 3:18-19

{When I say} to the wicked, 'Surely you will die,' and you do not warn him and you do not speak to warn [the] wicked from his wicked way {so that he may live}, that wicked [person] will die because of his guilt, and from your hand I will seek his blood.

Matthew 14:3-4

For Herod, [after] arresting John, bound him and put [him] in prison on account of Herodias, the wife of his brother Philip,

Acts 20:26-27

Therefore I testify to you on this very day that I am guiltless of the blood of all [of you],

Acts 24:24-26

And after some days, [when] Felix arrived with his wife Drusilla, who was Jewish, he sent for Paul and listened to him concerning faith in Christ Jesus.

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 must not expose the nakedness of your brother's wife; she [is] your brother's nakedness.
Leviticus 20:21
As for a man who marries his brother's wife, it [is] an abomination; he has exposed his brother's nakedness--they shall be childless.
1 Kings 22:14
Then Micaiah said, "{As Yahweh lives}, surely only as Yahweh speaks to me, that will I speak."
Ezekiel 3:18
{When I say} to the wicked, 'Surely you will die,' and you do not warn him and you do not speak to warn [the] wicked from his wicked way {so that he may live}, that wicked [person] will die because of his guilt, and from your hand I will seek his blood.
Matthew 14:3
For Herod, [after] arresting John, bound him and put [him] in prison on account of Herodias, the wife of his brother Philip,
Acts 20:26
Therefore I testify to you on this very day that I am guiltless of the blood of all [of you],
Acts 24:24
And after some days, [when] Felix arrived with his wife Drusilla, who was Jewish, he sent for Paul and listened to him concerning faith in Christ Jesus.

General references

Matthew 14:4
because John had been saying to him, "It is not permitted for you to have her."
Luke 3:19
But Herod the tetrarch, who had been reproved by him concerning Herodias, his brother's wife, and concerning all the evil deeds that Herod had done,