Acts 2:30
Since he was a prophet and knew that God had pledged His word that one of his [i.e., David's] descendants would sit on his throne [as king];
Luke 1:32
He will be great and will be called the Son of the Highest [i.e., God], and the Lord will give Him the throne of His forefather King David.
Luke 1:69-70
He has provided a horn of salvation [i.e., His saving strength] for us from a descendant of His servant King David [i.e., Jesus, born of Mary]
Hebrews 6:18
He did this so that by two unchangeable things [i.e., His promise and His oath], (and it is impossible for God to lie), we, who have fled [to God] for refuge, could be greatly encouraged to take hold of the hope set before us [i.e., the hope of never ending life].