'Joined' in the Bible

Thou shalt not be joined with them in burial, because thou hast destroyed thy land, thou hast slain thy people; the seed of evil-doers shall not be named for ever.

Neither let the foreigner, that hath joined himself to Jehovah, speak, saying, Jehovah will surely separate me from his people; neither let the eunuch say, Behold, I am a dry tree.