Once for all I have sworn by my holiness; I will not lie to David.
English Standard Version (ESV)
The phrasing "Once for all I have sworn" isn't just about a single oath, but emphasizes the absolute, unchangeable nature of God's commitment. He binds Himself by His own holiness, His very character, signifying that this promise is as immutable as He is. This isn't a casual vow, but a foundational declaration rooted in His perfect nature.
Once for all I have sworn by my holiness; I will not lie to David.
English Standard Version (ESV)
This passage comes in the midst of God's lament over the broken covenant with David's line. After recounting the promises made to David – an everlasting dynasty and an enduring throne – the psalmist describes God's response to the current national crisis, where it seems those promises have failed. God, however, reaffirms His unwavering commitment, emphasizing that His oath by His own holiness is an unbreakable guarantee of faithfulness.
God's promises are amazing, but what happens when God Himself adds a binding oath to His word? In Psalm 89, we see God doing just that.
Psalm 89:35 records God declaring, 'Once for all I have sworn by my holiness; I will not lie to David.' This isn't just a casual promise; it's an oath. An oath is a solemn declaration, a vow made binding by invoking a higher power or, in God's case, His own unchangeable character.
Why an Oath?
What does it mean for God to swear 'by my holiness'? It's not just a fancy phrase; it reveals the very essence of His faithfulness.
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When God swears 'by my holiness,' He's not invoking some external authority. He is swearing by Himself. His holiness is His defining characteristic: He is perfectly pure, set apart, and morally upright. This means:
Holiness Means Inability to Lie
Understand the original words
qodesh · Hebrew Noun
The absolute purity, set-apartness, and moral transcendence of God; it is the fundamental attribute of His nature that makes Him uniquely and entirely different from all created things.
Psalm 89 reflects on the faithfulness of God to His covenant with David, even amidst the downfall of the Davidic monarchy, pointing ultimately to the eternal reign of the Messiah.
c. 1000 BC— this verse
God's Covenant with David
God establishes an everlasting covenant with King David, promising that his dynasty and kingdom will endure forever through his descendant.
c. 975 BC
Division of the Kingdom
Following Solomon's death, the united kingdom of Israel splits into the Northern Kingdom of Israel and the Southern Kingdom of Judah, weakening the Davidic monarchy.
722 BC
Fall of the Northern Kingdom
The Assyrian Empire conquers and deports the Northern Kingdom of Israel, leaving only Judah with the Davidic line of kings.
586 BC
Babylonian Exile of Judah
The Babylonian Empire destroys Jerusalem and its Temple, exiling the people of Judah and ending the reign of the Davidic kings for a time.
c. 539 BC
Return from Exile
The Persian Empire allows the Judean exiles to return to Jerusalem, beginning the process of rebuilding the Temple and the community.
c. 4 BC
Birth of Jesus Christ
Jesus is born in Bethlehem, a descendant of David, fulfilling the Messianic promises and the Davidic covenant in a spiritual and eternal sense.
This passage directly records God's covenant with David, promising an everlasting dynasty and kingdom, which is the subject of the oath in Psalm 89:35.
Hebrews 6:13-18The author of Hebrews explains how God's oath to Abraham serves as a guarantee of His promises, paralleling the immutability and certainty God assures through His oath to David.
Jeremiah 31:31-34This prophecy describes a new covenant where God promises to write His law on hearts and forgive sins, reflecting the enduring faithfulness and mercy implied in the oath to David, especially concerning his lineage and the covenant's future.
Isaiah 55:3This verse speaks of God giving 'steadfast love' and 'sure promises' made to David, emphasizing the unbreakable nature of God's commitment that Psalm 89:35 assures through an oath.
pulpitPsalms 89:35: "Once have I sworn by my holiness that I will not lie unto David."
Verse 35. - Ones have I sworn by my holiness; rather, one thing have I sworn. (On God's oath to David, see vers. 3, 49, and Psalm 132:11.) The present passage shows that it was sworn "by his holiness" - i.e. by his absolute moral perfection. That I will not lie unto David; i.e. that I will keep all my promises to him. God, no doubt, always and in every case "keepeth his promise forever" (Psalm 146:6); but in his me…
clarkePsalms 89:35: "Once have I sworn by my holiness that I will not lie unto David."
Once have I sworn - I have made one determination on this head, and have bound myself by my holiness; it is impossible that I should change, and there needs no second oath, the one already made is of endless obligation.
The phrasing "Once for all I have sworn" isn't just about a single oath, but emphasizes the absolute, unchangeable nature of God's commitment. He binds Himself by His own holiness, His very character, signifying that this promise is as immutable as He is. This isn't a casual vow, but a foundational declaration rooted in His perfect nature.
This passage comes in the midst of God's lament over the broken covenant with David's line. After recounting the promises made to David – an everlasting dynasty and an enduring throne – the psalmist describes God's response to the current national crisis, where it seems those promises have failed. God, however, reaffirms His unwavering commitment, emphasizing that His oath by His own holiness is an unbreakable guarantee of faithfulness.
This passage comes in the midst of God's lament over the broken covenant with David's line. After recounting the promises made to David – an everlasting dynasty and an enduring throne – the psalmist describes God's response to the current national crisis, where it seems those promises have failed. God, however, reaffirms His unwavering commitment, emphasizing that His oath by His own holiness is an unbreakable guarantee of faithfulness.
"Once for all I have sworn by my holiness; I will not lie to David." — The phrasing "Once for all I have sworn" isn't just about a single oath, but emphasizes the absolute, unchangeable nature of God's commitment. He binds Himself by His own holiness, His very character…
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Last reviewed October 2026