Matthew 22:45

So then, if David calls Him (the Son, the Messiah) ‘Lord,’ how is He David’s son?”

Romans 1:3-4

[the good news] regarding His Son, who, as to the flesh [His human nature], was born a descendant of David [to fulfill the covenant promises],

John 8:58

Jesus replied, “I assure you and most solemnly say to you, before Abraham was born, I Am.”

Romans 9:5

To them belong the patriarchs, and from them, according to His natural descent, came the Christ (the Messiah, the Anointed), He who is exalted and supreme over all, God blessed forever. Amen.

Philippians 2:6-8

who, although He existed in the form and unchanging essence of God [as One with Him, possessing the fullness of all the divine attributes—the entire nature of deity], did not regard equality with God a thing to be grasped or asserted [as if He did not already possess it, or was afraid of losing it];

1 Timothy 3:16

And great, we confess, is the mystery [the hidden truth] of godliness:He (Jesus Christ) who was revealed in human flesh,
Was justified and vindicated in the Spirit,
Seen by angels,
Preached among the nations,
Believed on in the world,
Taken up in glory.

Hebrews 2:14

Therefore, since [these His] children share in flesh and blood [the physical nature of mankind], He Himself in a similar manner also shared in the same [physical nature, but without sin], so that through [experiencing] death He might make powerless (ineffective, impotent) him who had the power of death—that is, the devil—

Revelation 22:16

“I, Jesus, have sent My angel to testify to you and to give you assurance of these things for the churches. I am the Root (the Source, the Life) and the Offspring of David, the radiant and bright Morning Star.”

Treasury of Scripture Knowledge

Summary

If David then call him Lord, how is he his son?

Bible References

How

John 8:58
Jesus replied, “I assure you and most solemnly say to you, before Abraham was born, I Am.”
Romans 1:3
[the good news] regarding His Son, who, as to the flesh [His human nature], was born a descendant of David [to fulfill the covenant promises],
Romans 9:5
To them belong the patriarchs, and from them, according to His natural descent, came the Christ (the Messiah, the Anointed), He who is exalted and supreme over all, God blessed forever. Amen.
Philippians 2:6
who, although He existed in the form and unchanging essence of God [as One with Him, possessing the fullness of all the divine attributes—the entire nature of deity], did not regard equality with God a thing to be grasped or asserted [as if He did not already possess it, or was afraid of losing it];
1 Timothy 3:16
And great, we confess, is the mystery [the hidden truth] of godliness:He (Jesus Christ) who was revealed in human flesh,
Was justified and vindicated in the Spirit,
Seen by angels,
Preached among the nations,
Believed on in the world,
Taken up in glory.
Hebrews 2:14
Therefore, since [these His] children share in flesh and blood [the physical nature of mankind], He Himself in a similar manner also shared in the same [physical nature, but without sin], so that through [experiencing] death He might make powerless (ineffective, impotent) him who had the power of death—that is, the devil—
Revelation 22:16
“I, Jesus, have sent My angel to testify to you and to give you assurance of these things for the churches. I am the Root (the Source, the Life) and the Offspring of David, the radiant and bright Morning Star.”