τὸ ἐμμενές

From LSJ

πρέπει γὰρ τοὺς παῖδας ὥσπερ τῆς οὐσίας οὕτω καὶ τῆς φιλίας τῆς πατρικῆς κληρονομεῖν → it is right that children inherit their fathers' friendships just as they would their possessions

Source