2 Chronicles 22:11 shows Jehoshabeath hiding Joash — a concrete act preserving David's line, fulfilling God's promise in 21:7.

2 Chronicles 23:3 references God's promise to David's sons, directly echoing the covenant that preserved Jehoram's throne.

Psalm 89:28-34 affirms God's steadfast covenant with David and his promise not to break it — exactly what 2 Chronicles 21:7 references.

Luke 1:69 identifies Jesus as the 'horn of salvation' from David's house, fulfilling the covenant promise that preserves David's line forever.

Jeremiah 33:20-26 reinforces the inviolability of the Davidic covenant using the fixed order of day and night as a guarantee of permanence.

Isaiah 7:7 declares God's promise that the plot against David's line will not succeed — directly showing the covenant's protection.

Psalm 132:17-18 also uses the 'lamp' metaphor for David's dynasty, promising a horn (strength) and a crown for God's anointed.

Psalm 132:11 records God's oath to David that one of his sons will sit on his throne, the promise that underpins the preservation of his house here.

Psalm 89:39 laments God's apparent rejection of the Davidic covenant, contrasting with the assurance here that God keeps it by preserving a lamp.

2 Samuel 7:12-17 contains the original Davidic covenant promise that this verse alludes to — God's oath to establish David's throne forever.

2 Kings 8:19 is a parallel account with nearly identical wording, confirming God's faithfulness to David's covenant by preserving Jehoram's line.

1 Kings 11:36 uses the same 'lamp' metaphor for David's descendant, reinforcing God's promise to preserve a ruling line in Jerusalem.

1 Kings 11:13 shows God sparing one tribe for David's sake, echoing the same covenantal mercy that preserves a lamp here.

2 Samuel 23:5 is David's meditation on God's everlasting covenant — the same covenant that preserved his house in 2 Chronicles 21:7.

1 Kings 15:4 uses the same 'lamp' metaphor for David's line, showing God's consistent faithfulness to the covenant.

Jeremiah 33:21 affirms the unbreakable covenant with David, reinforcing the promise that David's line would continue.

Isaiah 7:6 depicts a plot to replace David's king — the very threat God's covenant protected against in 2 Chronicles 21:7.