LXX Deut 19:6

ἵνα μὴ διώξας ὁ ἀγχιστεύων τοῦ αἵματος ὀπίσω τοῦ φονεύσαντος, ὅτι παρατεθέρμανται τῇ καρδίᾳ, καὶ καταλάβῃ αὐτόν, ἐὰν μακροτέρα ἦν ἡ ὁδός, καὶ πατάξῃ αὐτοῦ ψυχήν· καὶ τούτῳ οὐκ ἔστιν κρίσις θανάτου, ὅτι οὐ μισῶν ἦν αὐτὸν πρὸ τῆς ἐχθὲς οὐδὲ πρὸ τῆς τρίτης.

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.