From the given sentence, extract the phrase (often noun or verb) that carries the given relationship. The generated phrase should be present in the sentence.

Given Relationship: 'be son of', Sentence: '9:6 to Jesus of Nazareth as the Messiah , as the son of David , the NT is not only in typological harmony , but is also consistent with the exegetical meaning of the Micaian and Isaianic Ahaz oracles , because Jesus was the son of David , begotten of God not only covenantally as David , but also as the uniquely-begotten Son of the God of heaven .'
son