"And let not my enemies mock me." And let them not mock me, who by ensnaring me with serpent-like and secret suggestions, and prompting me with "Well done, well done," have brought me down to this. "For all that wait upon You shall not be confounded" [Psalm 25:3].
I have a sufficient basis for hope, he is saying, in those who already believe in you and enjoy your aid. You are in the habit of showing care for them, while confounding those given to lawlessness.
Waiting for God means waiting courageously during the suffering of evils so that when he comes in his judgment he may grant what the spirit of the devoted person was seeking.
[AD 430] Augustine of Hippo on Psalms 25:3