Psalms 5:9 Commentary: The Open Grave of Deceitful Speech

Psalm 5 is a morning prayer (v.3). The heading assigns it to David, and many commentators connect it to the rebellion of Absalom (2 Sam 15, 17). David prays for guidance because his enemies are not merely physically violent but deeply treacherous. Verse 9 gives the evidence for why he cannot trust them.

The catalogue of body parts, mouth, heart, throat, tongue, is a Hebrew poetic device for totality. Each part portrays a different aspect of the wicked person’s character. The mouth lacks faithfulness (Hebrew ‘ēmūnâ, “steadfastness, reliability”). The Septuagint translates it alētheia, “truth.” The heart is destruction or literally wickednesses (plural intensifying the idea). The throat is an open tomb, an image of insatiable greed (Prov 27:20; 30:15, 16) and of corruption that spreads death to others. The tongue is used for flattery, literally “making smooth” (JFB), a tactic Absalom used to win the people’s allegiance (2 Sam 15:1, 6).

In the ancient Near Eastern court, flattery was a political weapon. David’s prayer contrasts these enemies with the righteous who worship in God’s house (v.7). The temple setting provides the moral frame: God’s presence is a place of truth, not smooth talk. The verse thus grounds David’s plea for guidance in the moral character of his opponents.

Paul’s later use in Romans 3:13, part of a catena of Old Testament texts proving universal sin, shows how the early church read this verse typologically, as a description of humanity apart from grace.

The consulted commentators note no significant textual variants for Psalm 5:9. The Hebrew text is stable. The Septuagint translates “there is no truth” (ouk estin alētheia), which is a faithful rendering of the Hebrew “no faithfulness.” The Vulgate follows the Septuagint. The verse is quoted in Romans 3:13 with minor adjustments for Paul's argument, but no textual issues are raised for the passage itself.

Paul's citation in Romans 3:13 gave the verse a central place in the New Testament argument for universal sin. This shaped its reception in the early church, where it was read as a proof-text for human depravity. During the Reformation, Calvin and Luther (the latter referenced in Lange's commentary) used the verse to describe the condition of the wicked and false teachers. The Geneva Bible applied the imagery to hypocrites who flatter while inwardly corrupt. The vivid metaphors, especially the open tomb, have continued to be used in preaching to warn against the destructiveness of deceitful speech and to highlight the need for divine guidance in a world of smooth talk.

Three-point outline

1. The Mouth Without Faithfulness, David begins with speech. There is no reliability, no truth in their words. Their promises are empty, their oaths meaningless. This is the foundation of deceit.
2. The Heart Full of Destruction, The inner self is not just flawed but “very wickedness” (Gill), a fountain of mischief. What comes out is rooted in what is inside (cf. Ps 51:6).
3. The Throat as an Open Grave and the Tongue of Flattery, The metaphor shifts from inner to outer: the throat swallows like death, and the tongue smooths over the evil with flattery. Destruction wears a pleasing mask.

Five-point outline

1. Their mouth produces no reliable word, every declaration is untrustworthy.
2. Their inner being is not merely flawed but the very substance of wickedness, a source of ongoing calamity.
3. Their throat is like a grave left open, insatiable and spreading corruption to everyone near.
4. Their tongue flatters deliberately, using smooth speech to conceal destructive intent.
5. David responds by praying for God’s guidance, refusing to rely on human judgment when faced with such deceit.

Illustration hooks

• A politician who promises everything to win votes but does the opposite once elected. The flattery of the campaign trail covers a self-serving agenda.
• The insidious nature of gossip that begins with “I’m only saying this for your good” but actually destroys reputations, smooth tongue, open grave.
• The experience of being manipulated by someone who speaks kindly but you sense something hollow underneath. The “open tomb” image captures the sense of danger hidden behind pleasant words.

Questions your congregation is asking

• How can I tell when flattery is just politeness versus when it is destructive deceit?
• Why does the Bible treat speech as such a serious moral issue?
• When someone has wronged me with smooth words, how do I respond without becoming bitter?

Psalm 5:9 pulls back the curtain on the enemy’s true character. It names what lies beneath smooth words: an untrustworthy mouth, a destructive heart, a death-dealing throat. This passage invites us to examine both the words of others and our own speech, and to bring the honest longing for guidance to the God who sees through every mask.

Discussion questions

1. Read Psalm 5:9 aloud. Which image stands out to you most, the unfaithful mouth, the destructive heart, the open tomb, or the flattering tongue? Why?
2. David describes his enemies’ speech as having “no faithfulness.” What does faithfulness in speech look like in your daily life?
3. The heart is called “destruction” (or “very wickedness”). How does this connect to Jesus’ teaching that out of the heart come evil thoughts (Mark 7:21-23)?
4. Why do you think Paul used this verse in Romans 3:13 to describe all of humanity? What does that tell us about the seriousness of sin?
5. Flattery is a form of deception. When is it difficult to distinguish flattery from genuine encouragement? How can we cultivate truthful speech?
6. David responds to these enemies by praying for God’s guidance (“Lead me, Yahweh, in your righteousness”). How does this shape your own response to people who speak deceitfully around you?
7. Where in your relationships might you need to ask God for a “straight way” (v.8) to walk in truth rather than flattery?