Deuteronomy 19:6

lest the avenger of the blood pursue the manslayer, 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.

Numbers 35:12

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

Deuteronomy 21:22

And when a man shall have committed a sin worthy of death, and he is to be put to death, and thou shall have hung him on a tree,

Joshua 20:5

And when the avenger of blood pursues after him, they shall not deliver the manslayer up into his hand because he smote his neighbour by error, nor did he have enmity with him before.

2 Samuel 14:7

And, behold, the whole family is risen against thy handmaid, and they said, Deliver him that smote his brother, that we may kill him for the life of his brother whom he slew, and we will destroy the heir also. So they shall quench my coal which is left and shall not leave to my husband neither name nor remainder upon the earth.

Jeremiah 26:15-16

But know ye for certain, that if ye put me to death, ye shall surely bring innocent blood upon yourselves and upon this city and upon its inhabitants; for of a truth the LORD has 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 they shall be unto you cities for refuge from the avenger that the manslayer not die until he stands before the congregation in judgment.
Joshua 20:5
And when the avenger of blood pursues after him, they shall not deliver the manslayer up into his hand because he smote his neighbour by error, nor did he have enmity with him before.
2 Samuel 14:7
And, behold, the whole family is risen against thy handmaid, and they said, Deliver him that smote his brother, that we may kill him for the life of his brother whom he slew, and we will destroy the heir also. So they shall quench my coal which is left and shall not leave to my husband neither name nor remainder upon the earth.

Not worthy

Deuteronomy 21:22
And when a man shall have committed a sin worthy of death, and he is to be put to death, and thou shall have hung him on a tree,
Jeremiah 26:15
But know ye for certain, that if ye put me to death, ye shall surely bring innocent blood upon yourselves and upon this city and upon its inhabitants; for of a truth the LORD has 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 who is to flee there, that he may live: whoever kills his neighbour by mistake, whom he hated not in time past;

General references

Numbers 35:19
The kinsman avenger of blood shall slay the murderer; when he meets him, he shall slay him.