17 ¶ A man that doeth violence to the blood of any person shall flee to the pit; let no man stay him.
When God blessed Noah and his sons after they left the Ark and gave them permission to eat the flesh of animals for the first time (compare Genesis 9:3 with Genesis 1:29) He also commanded that, unlike in His dealings with Cain after the murder of his brother, Abel, He would now ordain capital punishment for the murder of a man, whether it be by a beast or a man.
Genesis 9:5 And surely your blood of your lives will I require; at the hand of every beast will I require it, and at the hand of man; at the hand of every man’s brother will I require the life of man. 6 Whoso sheddeth man’s blood, by man shall his blood be shed: for in the image of God made he man.
In fact, the shedding of innocent blood pollutes a land when justice is not executed.
Numbers 35:33 So ye shall not pollute the land wherein ye are: for blood it defileth the land: and the land cannot be cleansed of the blood that is shed therein, but by the blood of him that shed it.
And again, with the exception of the cleansing of the promised land of Canaan from child sacrificing, bestiality loving, temple prostitute (male and female; the dog and the whore of Deuteronomy 23:18) using, incestuous degenerates; the Canaanites, God told the Hebrews that they were not to kill.
Exodus 20:13 (Deuteronomy 5:17) Thou shalt not kill.
Which the Lord Jesus Christ defined as murder.
Matthew 19:17b ……but if thou wilt enter into life, keep the commandments. 18 He saith unto him, Which? Jesus said, Thou shalt do no murder, Thou shalt not commit adultery, Thou shalt not steal, Thou shalt not bear false witness...
Here it is said that the man who commits murder will flee to his own destruction, the pit.
Psalm 30:3 O LORD, thou hast brought up my soul from the grave: thou hast kept me alive, that I should not go down to the pit.
Psalm 55:23 But thou, O God, shalt bring them down into the pit of destruction: bloody and deceitful men shall not live out half their days; but I will trust in thee.
It is the place of torment, Hell, prepared for Lucifer (Satan) in his judgment.
Isaiah 14:12 How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations! 13 For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north: 14 I will ascend above the heights of the clouds; I will be like the most High. 15 Yet thou shalt be brought down to hell, to the sides of the pit.
And for those angels who chose or choose to follow him.
Matthew 25:41 Then shall he say also unto them on the left hand, Depart from me, ye cursed, into everlasting fire, prepared for the devil and his angels:
[Important doctrinal note for Bible believers (the rest of you can go back to sleep): The Devil, Satan, aka Lucifer is not a “fallen” angel but a cherub (Ezekiel 28:14), one of the living spiritual creatures that are the spiritual prototypes for all living things (Ezekiel 1 and 10; Revelation 4). He has wings and is a reptilian dragon (Job 41; Revelation 12:9; 20:2; Isaiah 27:1) but can appear as an angel of light to deceive you as do his preachers (2 Corinthians 11:13-15) and he is the god of this world system (2 Corinthians 4:4). Angels don’t have wings (compare Daniel 9:21 with Luke 1:19; Revelation 21:17.) If you see an angel with wings start running….and praying. You’re in big trouble. You might invite an angel into your house unaware but I doubt you’d think your guest was just a poor stranger if he had the big wings of the mythological angels the Roman church borrowed from Persian Zoroastrianism (Hebrews 13:2). Angels are appearances, representatives of things and persons that can act as those things and persons and for all practical purposes are those things and persons. See Judges 2:1 for an appearance or angel of God; see Matthew 18:10 for angels or appearances of children, see Acts 12:15 for one reference to an appearance or angel of a man; and see Revelation 1:20 for appearances or angels of churches.]
This Proverb would say to not prevent the unrepentant murderer from fleeing to his own destruction. That would be under the Law of Moses. Under the Grace of the Lord Jesus Christ even a murderer could obtain forgiveness if He called on the name of the Lord. The assumption here is that he is unrepentant and flees to his own destruction without receiving the free gift of forgiveness by faith in and trusting in Christ. Let no man prevent him from his fate then but every murderer in every prison in the land should hear of Christ’s forgiveness and as much as it might rattle you, Christ might just decide to save that murderer. It may not be our way but it is certainly God’s way to forgive, even a murderer, if in sincerity and simplicity he asks for salvation.