Charles Ellicott Commentary Joshua 14:9

"And Moses sware on that day, saying, Surely the land whereon thy foot hath trodden shall be an inheritance to thee and to thy children for ever, because thou hast wholly followed Jehovah my God." — Joshua 14:9 (ASV)

And Moses sware on that day ... the land whereon thy feet have trodden shall be thine. —Whether Moses referred to Hebron specifically in this promise, it is impossible to say.