Deuteronomy 19:6

lest the avenger of blood pursue the manslayer, while his heart is hot, and overtake him, because the way is long, and smite him mortally; whereas he was not worthy of death, inasmuch as he hated him not in time past.

Numbers 35:12

And the cities shall be unto you for refuge from the avenger, that the manslayer die not, until he stand before the congregation for judgment.

Deuteronomy 21:22

And if a man have committed a sin worthy of death, and he be put to death, and thou hang him on a tree;

Joshua 20:5

And if the avenger of blood pursue after him, then they shall not deliver up the manslayer into his hand; because he smote his neighbor unawares, and hated him not beforetime.

2 Samuel 14:7

And, behold, the whole family is risen against thy handmaid, and they say, Deliver him that smote his brother, that we may kill him for the life of his brother whom he slew, and so destroy the heir also. Thus will they quench my coal which is left, and will leave to my husband neither name nor remainder upon the face of the earth.

Jeremiah 26:15-16

Only know ye for certain that, if ye put me to death, ye will bring innocent blood upon yourselves, and upon this city, and upon the inhabitants thereof; for of a truth Jehovah hath sent me unto you to speak all these words in your ears.

Treasury of Scripture Knowledge

Summary

Lest the avenger of the blood pursue the slayer, while his heart is hot, and overtake him, because the way is long, and slay him; whereas he was not worthy of death, inasmuch as he hated him not in time past.

In time past

General references

Bible References

The avenger

Numbers 35:12
And the cities shall be unto you for refuge from the avenger, that the manslayer die not, until he stand before the congregation for judgment.
Joshua 20:5
And if the avenger of blood pursue after him, then they shall not deliver up the manslayer into his hand; because he smote his neighbor unawares, and hated him not beforetime.
2 Samuel 14:7
And, behold, the whole family is risen against thy handmaid, and they say, Deliver him that smote his brother, that we may kill him for the life of his brother whom he slew, and so destroy the heir also. Thus will they quench my coal which is left, and will leave to my husband neither name nor remainder upon the face of the earth.

Not worthy

Deuteronomy 21:22
And if a man have committed a sin worthy of death, and he be put to death, and thou hang him on a tree;
Jeremiah 26:15
Only know ye for certain that, if ye put me to death, ye will bring innocent blood upon yourselves, and upon this city, and upon the inhabitants thereof; for of a truth Jehovah hath sent me unto you to speak all these words in your ears.

In time past

Deuteronomy 19:4
And this is the case of the manslayer, that shall flee thither and live: whoso killeth his neighbor unawares, and hated him not in time past;

General references

Numbers 35:19
The avenger of blood shall himself put the murderer to death: when he meeteth him, he shall put him to death.

American Standard Version Public Domain