In God we boast all the day long, and praise thy name for ever. Selah.
In God we boast - He is the object in whom our praises terminate. The Hebrew х haalal (H1984)] generally means to praise or celebrate in praises.
And praise thy name for ever - literally, 'and confess thy name,' etc.
Third strophe. The sad contrast which Israel's present affliction presents to God's past deliverances of His Church, and to her consequent trust in Him.