A closing phrase that itself signals that the discourse is ending is an instance of bara‘at al-maqta‘. Prayer, farewell, fulfillment, or a comprehensive final thought can provide an appropriate sense of closure.
«بَقِيتَ بَقَاءَ الدَّهْرِ يَا كَهْفَ أَهْلِهِ»
May you remain as long as time endures, shelter of your people.
The prayer brings the praise to a natural culmination and leaves the audience with a complete final impression.