Psalms 69:6

Let not them that wait on thee The truly pious, who believe thy promises, and look to thee for the fulfilment of them; who are conscious of their own weakness, and of the insufficiency of all human aid, and therefore apply to thee, and trust in thee for the help they want; be ashamed That is, frustrated of their just and reasonable expectations, which would make them ashamed of their past confidence in thee, and either to look up to thee in future, or to look upon their enemies with assurance, when they shall reproach them for their trust in thee; for my sake Because of my sad disappointments. For, if they see me forsaken, they will be discouraged by this example; or, let them not hang down their heads for shame to see me, who am thy worshipper, deserted of thee. He was afraid, if God did not appear for him, it would be a discouragement to other pious people, and give their enemies cause to triumph over them; and it was his earnest desire, whatever became of himself, that all the true people of God might retain their confidence and hope in God, and their boldness in his cause, and neither be discouraged in themselves, nor exposed to contempt from others.