LXX Num 23:1

Καὶ εἶπεν Βαλαὰμ τῴ Βαλάκ οἰκοδόμησόν μοι ἐνταῦθα ἑπτὰ βωμούς, καὶ ἑτοίμασόν μοι ἐνταῦθα ἑπτὰ μόσχους καὶ ἑπτὰ κριούς.

Then Balaam said to Balak, “Build for me seven altars here, and prepare for me seven bulls and seven rams.”