Psalm 2:8 promises God will give the nations to the anointed king, mirroring the granting of heart's desire.

Psalm 20:4 prays for God to give the king his heart's desire, which Psalm 21:2 confirms was granted.

Psalm 20:5 prays for God to grant all requests, directly echoed in Psalm 21:2's statement of fulfillment.

Psalm 37:4 promises that delighting in the Lord brings the desires of your heart, directly paralleling the king's experience.

Proverbs 10:24 directly states that the desire of the righteous is granted — the same principle as God giving the king his heart's desire.

Proverbs 13:19 affirms that a desire accomplished is sweet — echoing the fulfillment of the king's request in Psalm 21:2.