'Joins' in the Bible

This is what everyone who is counted shall give [as he joins those already counted]: a half shekel, according to the sanctuary shekel (the shekel is twenty gerahs); a half shekel as a contribution to the Lord.

Everyone who is counted, from twenty years old and over, [as he joins those already counted], shall give this contribution to the Lord.

Do you not know that the one who joins himself to a prostitute is one body with her? For He says, “The two shall be one flesh.”

to be subject to such leaders [treating them with courtesy and respect], and to everyone who helps in the work and labors [for the benefit of yourselves and the church].