LXX Deut 29:25

καὶ ἐροῦσιν ὅτι κατελίποσαν τὴν διαθήκην κυρίου τοῦ θεοῦ τῶν πατέρων αὐτῶν, ἃ διέθετο τοῖς πατράσιν αὐτῶν ὅτε ἐξήγαγεν αὐτοὺς ἐκ γῆς Αἰγύπτου,

And the people will answer, ‘It is because they abandoned the covenant of the LORD, the God of their fathers, which He made with them when He brought them out of the land of Egypt.