Genesis 4:15

And Jehovah said to him, Therefore, whoever slayeth Cain, it shall be revenged sevenfold. And Jehovah set a mark on Cain, lest any finding him should smite him.

Ezekiel 9:4

and Jehovah said unto him, Go through the midst of the city, through the midst of Jerusalem, and set a mark upon the foreheads of the men that sigh and that cry for all the abominations that are done in the midst thereof.

Ezekiel 9:6

Slay utterly the old man, the young man, and the maiden, and little children, and women; but come not near any man upon whom is the mark; and begin at my sanctuary. Then they began at the elders who were before the house.

Genesis 4:24

If Cain shall be avenged seven-fold; Lemech seventy and seven fold.

Psalm 79:12

And render unto our neighbours, sevenfold into their bosom, their reproach, wherewith they have reproached thee, O Lord.

Revelation 14:9

And another, a third, angel followed them, saying with a loud voice, If any one do homage to the beast and its image, and receive a mark upon his forehead or upon his hand,

Revelation 14:11

And the smoke of their torment goes up to ages of ages, and they have no respite day and night who do homage to the beast and to its image, and if any one receive the mark of its name.

Leviticus 26:18

And if for this ye hearken not unto me, I will punish you sevenfold more for your sins,

Leviticus 26:21

And if ye walk contrary unto me, and will not hearken unto me, I will bring sevenfold more plagues upon you according to your sins.

Leviticus 26:24

then will I also walk contrary unto you, and will smite you, even I, sevenfold for your sins.

Leviticus 26:28

then I will walk contrary unto you also in fury; and I, even I, will chastise you seven-fold for your sins.

1 Kings 16:7

And also through the prophet Jehu the son of Hanani the word of Jehovah came against Baasha, and against his house, even for all the evil that he did in the sight of Jehovah, provoking him to anger with the work of his hands, in being like the house of Jeroboam; and because he had smitten him.

Psalm 59:11

Slay them not, lest my people forget; by thy power make them wander, and bring them down, O Lord, our shield.

Proverbs 6:31

and if he be found, he shall restore sevenfold; he shall give all the substance of his house.

Hosea 1:4

And Jehovah said unto him, Call his name Jizreel; for yet a little, and I will visit the blood of Jizreel upon the house of Jehu, and will cause the kingdom of the house of Israel to cease.

Matthew 26:52

Then saith Jesus to him, Return thy sword to its place; for all who take the sword shall perish by the sword.

Treasury of Scripture Knowledge

Summary

And the LORD said unto him, Therefore whosoever slayeth Cain, vengeance shall be taken on him sevenfold. And the LORD set a mark upon Cain, lest any finding him should kill him.

Set a mark, etc

Bible References

Therefore

1 Kings 16:7
And also through the prophet Jehu the son of Hanani the word of Jehovah came against Baasha, and against his house, even for all the evil that he did in the sight of Jehovah, provoking him to anger with the work of his hands, in being like the house of Jeroboam; and because he had smitten him.
Psalm 59:11
Slay them not, lest my people forget; by thy power make them wander, and bring them down, O Lord, our shield.
Hosea 1:4
And Jehovah said unto him, Call his name Jizreel; for yet a little, and I will visit the blood of Jizreel upon the house of Jehu, and will cause the kingdom of the house of Israel to cease.
Matthew 26:52
Then saith Jesus to him, Return thy sword to its place; for all who take the sword shall perish by the sword.

Sevenfold

Genesis 4:24
If Cain shall be avenged seven-fold; Lemech seventy and seven fold.
Leviticus 26:18
And if for this ye hearken not unto me, I will punish you sevenfold more for your sins,
Psalm 79:12
And render unto our neighbours, sevenfold into their bosom, their reproach, wherewith they have reproached thee, O Lord.
Proverbs 6:31
and if he be found, he shall restore sevenfold; he shall give all the substance of his house.

Set a mark, etc

Ezekiel 9:4
and Jehovah said unto him, Go through the midst of the city, through the midst of Jerusalem, and set a mark upon the foreheads of the men that sigh and that cry for all the abominations that are done in the midst thereof.
Revelation 14:9
And another, a third, angel followed them, saying with a loud voice, If any one do homage to the beast and its image, and receive a mark upon his forehead or upon his hand,