'Join' in the Bible

And in the end of years they shall join themselves together; for the king's daughter of the south shall come to the king of the north to make an agreement: but she shall not retain the power of the arm; neither shall he stand, nor his arm: but she shall be given up, and they that brought her, and he that begat her, and he that strengthened her in these times.

And after they join themselves unto him, he worketh deceit, and hath increased, and hath been strong by a few of the nation.

When defeated, they will be helped by some, but many others will join them insincerely.