The Assyrian King Shakes His Fist at Jerusalemby emmanuel_higgins

Isaiah 10:5

O Assyrian, the rod of mine anger, and the staff in their hand is mine indignation.

The rod of anger and the staff of indignation are the Assyrian hosts and armies, taken up as instruments in God's hand to carry out His judgment. They were empowered to execute that judgment against Israel, the northern kingdom, and their destroying power served His purpose in the fall and destruction of Samaria. The boastful Assyrian power was thus used by God for a time and for a season to punish the nations. That commission was temporary, and Assyria was not to prevail always.