Psalm 89:36-37 emphasizes the enduring reliability of God's promise concerning David's offspring and throne. The verses primarily describe the permanence of the Davidic covenant rather than directly predicting the personal moral quality of the Messiah called "faithfulness."

Revelation 1:5 calls Jesus "the faithful witness," and Revelation 19:11 names the victorious rider "Faithful and True." The New Testament thus clearly attributes perfect faithfulness to Christ. The connection with Psalm 89 is best understood through covenant fulfillment: God's own faithfulness guarantees the Davidic promise, and Jesus, the final Davidic King, perfectly embodies faithfulness in His person and reign. The description field's connection is therefore theological rather than a direct lexical prophecy from verses 36-37.