Numbers 35:27 (BSB)

and the avenger of blood finds him outside of his city of refuge and kills him, then the avenger will not be guilty of bloodshed,

From Numbers 35. Also in the ESV.

Commentary on Numbers 35:27

• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Numbers 35:27: And the revenger of blood find him without the borders of the city of his refuge,.... Without the suburbs, fields, and vineyards belonging to it: and the revenger of blood kill the slayer; being exasperated against him, and to avenge the blood of his relation on him: he shall not be guilty of blood; or be reckoned murderer, or die for it.
• Geneva Bible Notes (Reformed), Geneva Bible Study Notes on Numbers 35:27: And the revenger of blood find him without the borders of the city of his refuge, and the revenger of blood kill the slayer; he shall not be guilty of blood: (k) By the sentence of the judge.
• Keil & Delitzsch (Lutheran), Biblical Commentary on the Old Testament on Numbers 35:26-28: Num 35:26-28 If he left the city of refuge before this, and the avenger of blood got hold of him, and slew him outside the borders (precincts) of the city, it was not to be reckoned to him as blood (דּם לו אין, like דּמים לו אין, Exo 22:1).