LXX Deut 11:2

καὶ καὶ γνώσεσθε σήμερον ὅτι οὐχὶ τὰ παιδία ὑμῶν, ὅσοι οὐκ οἴδασιν οὐδὲ ἴδοσαν τὴν παιδίαν κυρίου τοῦ θεοῦ σου καὶ τὰ μεγαλεῖα αὐτοῦ καὶ τὴν χεῖρα τὴν κραταιὰν καὶ τὸν βραχίονα τὸν ὑψηλόν,

Know this day that it is not your children who have known and seen the discipline of the LORD your God: His greatness, His mighty hand, and His outstretched arm;