Parallel
Joshua (Vaticanus B-text) 23:6
Rahlfs Septuagint (1935) · Berean Standard Bible
κατισχύσατε οὖν σφόδρα φυλάσσειν καὶ ποιεῖν πάντα τὰ γεγραμμένα ἐν τῷ βιβλίῳ τοῦ νόμου Μωυσῆ ἵνα μὴ ἐκκλίνητε εἰς δεξιὰν ἢ εὐώνυμα
Be very strong, then, so that you can keep and obey all that is written in the Book of the Law of Moses, not turning aside from it to the right or to the left.