Matthew Henry on Psalms 58:1-5

When wrong is done under the form of law, it is worse than any other; especially it is grievous to behold those who profess to be children of God, joining together against any of his people. We should thank the Lord for merciful restraints; we should be more earnest in seeking renewing grace, more watchful over ourselves, and more patient under the effects of fallen nature in others. The corruption of their nature was the root of bitterness. We may see in children the wickedness of the world beginning. They go astray from God and their duty as soon as possibly they can. And how soon will little children tell lies! It is our duty to take pains to teach them, and above all, earnestly to pray for converting grace to make our children new creatures. Though the poison be within, much of it may be kept from breaking forth to injure others. When the Saviour's words are duly regarded, the serpent becomes harmless. But those who refuse to hear heavenly wisdom, must perish miserably, for ever.