LXX Gen 32:32

ἕνεκεν γὰρ τούτου οὐ μὴ φάγωσιν οἱ υἱοὶ Ἰσραὴλ τὸ νεῦρον ὃ ἐνάρκησεν, ὅ ἑστιν ἐπὶ τοῦ πλάτους τοῦ μηροῦ Ἰακώβ, ἕως τῆς ἡμέρας· ταύτης· ὅτι ἥψατο τοῦ πλάτους τοῦ μηροῦ Ἰακὼβ τοῦ νεύρου, καὶ ἐνάρκησεν.’

Therefore to this day the Israelites do not eat the tendon which is at the socket of the hip, because the socket of Jacob’s hip was struck near that tendon.