Yahweh, via Zephaniah, would remove all the disasters from the Israelites. They would not have to bear any reproach. Yahweh was going to deal with all their oppressors. He was going to save the lame and gather the outcasts, so that their shame would be turned to praise. The Israelites would be known throughout the whole world.
Psalm 72 is a long blessing for a king. The only name mentioned is King Solomon, so that it might have been on his coronation. This is more or less a portrait of an ideal king. In this first section there is an emphasis on just judgments, especially for the helpless and the weak. The king is to rule with the justice and the righteousness of God. The mountains and the hills were to bring prosperity to the people. However, the primary task of the king was to defend the poor and the needy so that they would be delivered from their oppressors.