Didn't the sins of David's sons end the covenant with David?

The short answer Settled

No. God swore the covenant with David by oath. He said beforehand that the sins of David's sons would bring punishment, and in the same breath He said He would not break His covenant or change His word. The lament later in the psalm describes that punishment. It does not cancel the covenant. The conditions in Psalm 132 and 1 Kings 9 governed which of David's sons would reign, and when. Scripture shows what happened when they were broken: a smaller kingdom and an affliction with an end, not the end of the covenant.

A covenant sworn by oath

God calls the promise both a covenant and an oath: "I have made a covenant with My chosen, I have sworn to My servant David" (Psalm 89:3). Its content is David's line and throne: "Your seed I will establish forever, And build up your throne to all generations" (Psalm 89:4).

God then says what He will not do: "My covenant I will not break, Nor alter the word that has gone out of My lips" (Psalm 89:34). He backs it with an oath: "Once I have sworn by My holiness; I will not lie to David" (Psalm 89:35). And He names what the oath secures: "His seed shall endure forever, And his throne as the sun before Me" (Psalm 89:36).

Jeremiah says the same while Jerusalem is under siege: "David shall never lack a man to sit on the throne of the house of Israel" (Jeremiah 33:17). The covenant with David could be broken only "If you can break My covenant with the day and My covenant with the night" (Jeremiah 33:20).

Sin foreseen, punishment assigned

God did not overlook the possibility that David's sons would sin. He wrote it into the promise: "If his sons forsake My law And do not walk in My judgments" (Psalm 89:30). He also said what their sin would bring: "Then I will punish their transgression with the rod, And their iniquity with stripes" (Psalm 89:32).

The very next words deny the other result: "Nevertheless My lovingkindness I will not utterly take from him, Nor allow My faithfulness to fail" (Psalm 89:33). Real punishment and an unbroken covenant are stated side by side.

The lament that follows

God's quoted words end at verse 37. At verse 38 the psalmist begins speaking to God: "But You have cast off and abhorred, You have been furious with Your anointed" (Psalm 89:38). He says, "You have renounced the covenant of Your servant; You have profaned his crown by casting it to the ground" (Psalm 89:39). The verses that follow describe defenses broken down, defeat in battle, the throne cast to the ground, and shame (Psalm 89:40-45).

Those are the conditions God had already assigned as punishment in verse 32. Verses 33 to 35 had already ruled out the covenant's failure. The lament describes the rod; it does not rewrite the oath.

"If your sons will keep My covenant"

Psalm 132 does attach a condition to the throne, but it states the oath first: "The LORD has sworn in truth to David; He will not turn from it" (Psalm 132:11). Only then does it add, "If your sons will keep My covenant," with the result, "Their sons also shall sit upon your throne forevermore" (Psalm 132:12). The condition decides whether each generation of sons keeps the throne. It follows an oath God says He will not turn from, so it cannot be the way He turns from it.

That matches the covenant's first words to David. Of David's son God said, "If he commits iniquity, I will chasten him with the rod of men" (2 Samuel 7:14), and "My mercy shall not depart from him, as I took it from Saul" (2 Samuel 7:15).

When the condition was broken

God set a condition before Solomon as well. If Solomon walked as David did, "then I will establish the throne of your kingdom over Israel forever" (1 Kings 9:5). If he or his sons turned to other gods, Israel would be cut off from the land and the temple cast out of God's sight (1 Kings 9:6-7).

Scripture reports that Solomon did turn (1 Kings 11:9-10), and it records what God did. He tore the kingdom from Solomon's son, yet "I will not tear away the whole kingdom; I will give one tribe to your son for the sake of My servant David" (1 Kings 11:13). He kept that tribe "that My servant David may always have a lamp before Me in Jerusalem" (1 Kings 11:36). And He set a limit on the judgment: "I will afflict the descendants of David because of this, but not forever" (1 Kings 11:39).

The broken condition cost David's sons the throne over all Israel. What God kept, He kept for David. After the resurrection, Peter still speaks of the oath as standing: David knew "that God had sworn with an oath to him that of the fruit of his body, according to the flesh, He would raise up the Christ to sit on his throne" (Acts 2:30).

The usual objection

The objection says that David's descendants sinned, the kingdom fell under judgment, and the throne was left empty. Psalm 89 itself says God "renounced the covenant." So the covenant with David must have been revoked, changed, or passed to a different people. Psalm 132 and 1 Kings 9 seem to settle it, since both make the throne depend on obedience.

That reasoning lets the circumstances decide what the covenant means. But God stated its terms Himself: He foresaw the sin, assigned the punishment, swore by His holiness, and said He would not break His covenant or change His word. The psalmist's grief is real, and it is recorded honestly. It cannot reverse what God had just sworn.

The conditions in Psalm 132 and 1 Kings 9 are real too, and they were enforced. But Scripture shows what enforcing them meant: a divided kingdom and an affliction with an end, with a lamp kept in Jerusalem for David's sake.

The words behind it