Psalm 64:7-9

Amplified Bible

⁷ 
But God will shoot them with an [unexpected] arrow;
Suddenly they will be wounded.
⁸ 
So they will be caused to stumble;
Their own tongue is against them;
All who gaze at them will shake the head [in scorn].
⁹ 
Then all men will fear [God’s judgment];
They will declare the work of God,
And they will consider and wisely acknowledge what He has done.