LXX Gen 19:34

ἐγένετο δὲ τῇ ἐπαύριον καὶ εἶπεν ἡ πρεσβυτέρα πρὸς τὴν νεωτέραν Ἰδοῦ ἐκοιμήθην ἐχθὲς μετὰ τοῦ πατρὸς ἡμῶν· ποτίσωμεν αὐτὸν οἶνον καὶ τὴν νύκτα ταύτην, καὶ εἰσελθοῦσα κοιμήθητι μετ’ αὐτοῦ, καὶ ἐξαναστήσωμεν ἐκ τοῦ πατρὸς ἡμῶν σπέρμα.

The next day the older daughter said to the younger, “Look, I slept with my father last night. Let us get him drunk with wine again tonight so you can go in and sleep with him and we can preserve our father’s line.”