LXX Gen 31:48

εἶπεν δὲ Λαβὰν τῷ Ἰακώβ Ἴδου ὁ βουνὸς οὗτος καὶ ἡ στήλη αὕτη ἢν ἔστησα ἀνὰ μέσον ἐμοῦ καὶ σοῦ· μαρτυρεῖ ὁ βουνὸς οὗτος, καὶ μαρτυρεῖ ἡ στήλη αὕτη· διὰ τοῦτο ἐκλήθη τὸ ὄνομα αὐτοῦ βουνὸς μαρτυρεῖ,

Then Laban declared, “This mound is a witness between you and me this day.” Therefore the place was called Galeed.