Genesis 4:15

Overview - Genesis 4
The birth, occupation, and offering of Cain and Abel.
Cain murders his brother Abel.
11 The curse of Cain.
17 Has a son called Enoch, and builds a city, which he calls after his name.
18 His descendants, with Lamech and his two wives.
25 The birth of Seth,
26 and Enos.
Treasury of Scripture Knowledge

Genesis 4:15  (King James Version)
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.

1 Kings 16:7 ; Psalms 59:11 ; Hosea 1:4 ; Matthew 26:52

24 ; Leviticus 26:18 Leviticus 26:21 Leviticus 26:24 Leviticus 26:28 ; Psalms 79:12 ; Proverbs 6:31

set a mark, etc
Or, rather, "gave a sign or token to Cain, that those who found him should not kill him."
Ezekiel 9:4 Ezekiel 9:6 ; Revelation 14:9 Revelation 14:11