Deuteronomy 19:6

Otherwise, the avenger of blood might pursue the manslayer in a rage, overtake him if the distance is great, and strike him dead though he did not deserve to die, since he did not intend any harm.
BSB · Berean Standard 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.

Note slay…: Heb. smite him in life

Note in…: Heb. from yesterday the third day

KJV · King James Version
Otherwise, the avenger of blood might pursue the man slayer while hot anger is in his heart and overtake him, because the way is long, and strike him mortally, even though he was not worthy of death, because he didn’t hate him in time past.
WEB · 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 smite him mortally; whereas he was not worthy of death, inasmuch as he hated him not in time past.
ASV · American Standard Version

Related passages

From the Treasury of Scripture Knowledge, grouped by the word they explain.

the avenger
Numbers 35:12; Joshua 20:5; 2 Samuel 14:7
slay him
Heb. smite him in life. not worthy.
Deuteronomy 21:22; Jeremiah 26:15, 16
in time past
Heb. from yesterday the third day.
Deuteronomy 19:4