LXX Deut 6:2

ἵνα φοβῆσθε Κύριον τὸν θεὸν ὑμῶν· φυλάσσεσθε πάντα τὰ δικαιώματα αὐτοῦ καὶ τὰς ἐντολὰς αὐτοῦ ὅσας ἐγὼ ἐντέλλομαί σοι σήμερον, σὺ καὶ οἱ υἱοί σου καὶ οἱ υἱοὶ τῶν υἱῶν σου πάσας τὰς ἡμέρας τῆς ζωῆς σου, ἵνα μακροημερεύσητε.

so that you and your children and grandchildren may fear the LORD your God all the days of your lives by keeping all His statutes and commandments that I give you, and so that your days may be prolonged.