This masculine noun with preposition means 'in the throng' or 'in the crowd,' appearing in Psalm 55:14 where David laments betrayal by a close friend. He recalls how they 'used to walk in the throng' to the house of God—joining the festive crowds of worshipers going up to the temple. The term captures the communal, public nature of Israelite worship—not solitary piety but corporate participation in pilgrimage festivals. The betrayal stings more sharply because this friend shared in this sacred communal activity. The 'throng' represents joyful, noisy fellowship in worship, now forever tainted by treachery.