LXX Deut 31:23

καὶ ἐντείλατο Ἰησοῖ καὶ εἶπεν Ἀνδρίζου καὶ ἴσχυε· σὺ γὰρ εἰσάξεις τοὺς υἱοὺς Ἰσραὴλ εἰς τὴν γῆν ἢν ὤμοσεν Κύριος αὐτοῖς, καὶ αὐτὸς ἔσται μετὰ σοῦ.

Then the LORD commissioned Joshua son of Nun and said, “Be strong and courageous, for you will bring the Israelites into the land that I swore to give them, and I will be with you.”