Psalm 132

This is a longer song of ascent. It isn't attributed to David, but God's promise to him is the theme of the song. Because of David's pursuit of God, he was given the promise of being the predesessor to God's anointed one.(Emphasis on one). There was kingly DNA that made up Jesus' body. Maybe Jesus had a resemblance to his earthly ancestor. God spoke with foreknowledge about what would happen over the centuries after David slept in death. And this psalm writer caught a small glimps of what God was planning to do: something wonderful.
Stuart