I have made a covenant with my chosen, I have sworn unto David my servant, Thy seed will I establish for ever, and build up thy throne to all generations. And the heavens shall praise thy wonders ... thy faithfulness also in the congregation of the saints ... Then thou spakest in vision to thy Holy One, and saidst, I have laid help upon One that is mighty; I have exalted One chosen out of the people. I have found David my servant; with my Holy oil have I anointed Him:

With whom my hand shall be established; mine arm also shall strengthen Him ... My faithfulness and my mercy shall be with Him and in my name shall His horn be exalted. I will set His hand also in the sea, and His right hand in the rivers. He shall cry unto me, Thou art my Father, my God, and the Rock of my salvation. Also I will make Him my First-born, higher than the kings of the earth. My covenant shall stand fast with Him. His seed also will I make to endure for ever, and His throne as the days of the heavens. Once have I sworn by my holiness, that I will not lie unto David. His seed shall endure for ever, and His throne as the sun before me. It shall be established for ever as the moon, and as a faithful witness in the clouds. Ps. lxxxix 3-5, 19-21, 24-29, 35, 37.

So also in other Psalms, as Ps. xiv 1-17; Ps. cxxii 4, 5; Ps. cxxxii 8-18.