The same opening phrase and verb, repeated to open this psalm's second, public-facing stanza.
In that day you will say, “I will give thanks to you, Yahweh; for though you were angry with me, your anger has turned away and you comfort me.
In that day you will say, “Give thanks to Yahweh! Call on his name. Declare his doings among the peoples. Proclaim that his name is exalted!
This short psalm closes the entire unit begun in chapter 7 - the Syro-Ephraimite crisis, Immanuel, and Assyria's threat all resolve here into a single song of trust.