New Living Translation (©2007)
"If the distance to the nearest city of refuge is too far, an enraged avenger might be able to chase down and kill the person who caused the death. Then the slayer would die unfairly, since he had never shown hostility toward the person who died.

English Standard Version (©2001)
lest the avenger of blood in hot anger pursue the manslayer and overtake him, because the way is long, and strike him fatally, though the man did not deserve to die, since he had not hated his neighbor in the past.

New American Standard Bible (©1995)
otherwise the avenger of blood might pursue the manslayer in the heat of his anger, and overtake him, because the way is long, and take his life, though he was not deserving of death, since he had not hated him previously.

GOD'S WORD® Translation (©1995)
Otherwise, in a rage the relative who has the authority to avenge the death will pursue him. If the place is too far away, the relative may catch up with him and take his life even though he didn't deserve the death penalty, because in the past he never hated the person he killed.

King James Bible
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.

American King James Version
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.

American Standard Version
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.

Bible in Basic English
For if not, he who has the right of punishment may go running after the taker of life in the heat of his wrath, and overtake him because the way is long, and give him a death-blow; though it is not right for him to be put to death because he was not moved by hate.

Douay-Rheims Bible
Lest perhaps the next kinsman of him whose blood was shed, pushed on by his grief should pursue, and apprehend him. if the way be too long, and take away the life of him who is not guilty of death, because he is proved to have had no hatred before against him that was slain.

Darby Bible Translation
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, since he hated him not previously.

English Revised Version
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.

Webster's Bible Translation
Lest the avenger of blood shall 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.

World English Bible
lest the avenger of blood pursue the manslayer, while his heart is hot, and overtake him, because the way is long, and strike him mortally; whereas he was not worthy of death, inasmuch as he didn't hate him in time past.

Young's Literal Translation
lest the redeemer of blood pursue after the man-slayer when his heart is hot, and hath overtaken him (because the way is great), and hath smitten him -- the life, and he hath no sentence of death, for he is not hating him heretofore;