'Joined' in the Bible

And Absalom sent for Ahithophel the Gilonite, one of David's helpers, from Giloh his town, while he was making the offerings. And the design against David became strong, for more and more people were joined to Absalom.

And word came to David, saying, Ahithophel is among those who are joined to Absalom. And David said, O Lord, let the wisdom of Ahithophel be made foolish.