Psalms 25:3

Yea, let none that wait on thee be ashamed,....

On the other hand, the disappointment of the perfidious, who, unprovoked, have done evil, is invoked (compare 2Sa 22:9). On the ground of former favor, he invokes divine guidance, according to God's gracious ways of dealing and faithfulness. Confessing past and present sins, he pleads for mercy, not on palliations of sin, but on God's well-known benevolence.

Yea, let none that wait on thee be ashamed. Suffering enlarges the heart by creating the power to sympathize. If we pray eagerly for ourselves, we shall not long be able to forget our fellow sufferers. None pity the poor like those who have been or are still poor, none have such tenderness for the sick as those who have been long in ill health themselves. We ought to be grateful for occasional griefs if they preserve us from chronic hardheartedness; for of all afflictions, an unkind heart is the worst, it is a plague to its possessor, and a torment to those around him. Prayer when it is of the Holy Ghost's teaching is never selfish; the believer does not sue for monopolies for himself, but would have all in like case to partake of divine mercy with him. The prayer may be viewed as a promise; our Heavenly Father will never let his trustful children find him untrue or unkind. He will ever be mindful of his covenant. Let them be ashamed which transgress without cause. David had given his enemies no provocation; their hatred was wanton. Sinners have no justifiable reason or valid excuse for transgressing; they benefit no one, not even themselves by their sins; the law against which they transgress is not harsh or unjust; God is not a tyrannical ruler, providence is not a bondage: men sin because they will sin, not because it is either profitable or reasonable to do so. Hence shame is their fitting reward. May they blush with penitential shame now, or else they will not be able to escape the everlasting contempt and the bitter shame which is the portion of fools in the world to come.

Let none that wait on thee be ashamed - Though he had burden enough of his own, he felt for others in similar circumstances, and became an intercessor in their behalf. Transgress without cause - Perhaps בוגדים bogedim may here mean idolatrous persons. “Let not them that wait upon and worship thee be ashamed: but they shall be ashamed who vainly worship, or trust in false gods.” See Mal 2:11-16. The Chaldeans have evil entreated us, and oppressed us: they trust in their idols, let them see the vanity of their idolatry.

Yea, let none that wait on thee be ashamed - To “wait on the Lord” is an expression denoting true piety, as indicating our dependence on him, and as implying that we look to Him for the command that is to regulate our conduct and for the grace needful to protect and save us. Compare Isa 40:31. See also Isa 8:17; Isa 30:18; Psa 40:1; Psa 69:3. This petition is indicative of the wish of the pious heart that none who profess to serve God may ever be put to shame; that they may never be overcome by sin; that they may never fall under the power of temptation; that they may not fail of eternal salvation. Let them be ashamed which transgress without cause - This does not imply that any sinners transgress otherwise than without cause, or that they have any good reason for sinning; but it brings into view a prominent thought in regard to sin, that it is without cause. If the wicked had any good reason for their course of life - if they were compelled to do wrong - if the temptations under which they act were so powerful that they could not resist them - if they were not voluntary in their transgressions - then true benevolence would demand of us the prayer that they might not be confounded or put to shame. However, since none of these circumstances occur in the case of the sinner, there is no lack of benevolence in praying that all the workers of evil may be put to confusion; that is, that they may not triumph in an evil course, but that their plans may be defeated, and that they may be arrested in their career. There is no benevolence in desiring the triumph of wickedness; there is no lack of benevolence in praying that all the plans of wicked men may be confounded, and all the purposes of evil be frustrated. True benevolence requires us to pray that all their plans may be arrested, and that the sinner may not be successful in his career. […]