'Hired' in the Bible

In that day will the Lord, with a razor which is hired beyond the river, with the king of Assyria, shave the head and the hair of the feet, yea, the beard also will it take away.

And now Jehovah speaketh saying, Within three years, as the years of a hired servant, and the glory of Moab shall be brought to nothing, with all that great multitude; and the remnant shall be small, few, of no account.

For thus hath the Lord said unto me: Within a year, according to the years of a hired servant, and all the glory of Kedar shall fail;