1 Kings 1:21
Otherwise it shall come to pass, when my lord the king shall sleep with his fathers, that I and my son Solomon shall be counted offenders.
Cross-reference
In 1 Kings 1:12, Nathan warns Bathsheba she must act to save her life and Solomon's—this advice prompts her speech in verse 21.
1 Kings 2:10 records David's death and burial — the very event Bathsheba fears here, fulfilling the 'sleep with his fathers' phrase.
In 1 Kings 2:15, Adonijah confirms he expected to be king, showing Bathsheba's fear of him seizing power was justified.
In 1 Kings 2:22-24, Solomon's deadly reaction to Adonijah fulfills Bathsheba's fear that she and Solomon would be treated as offenders.
In 2 Samuel 7:12, God promises David a successor from his own body—the divine promise behind the very succession crisis Bathsheba fears.
In 1 Chronicles 17:11, the same phrase 'sleep with your fathers' appears in God's promise to David, grounding Bathsheba's concern in the covenantal plan.
Deuteronomy 31:16 uses 'lie down with your fathers' for Moses' death — same idiom as here, and both warn of trouble after the leader's death.