'Son' in the Bible

to reveal his Son in me, that I might preach him among the Gentiles, I didn't immediately confer with flesh and blood,

I have been crucified with Christ, and it is no longer I that live, but Christ living in me. That life which I now live in the flesh, I live by faith in the Son of God, who loved me, and gave himself up for me.

But when the fullness of the time came, God sent out his Son, born to a woman, born under the law,

And because you are children, God sent out the Spirit of his Son into your hearts, crying, "Abba, Father!"

So you are no longer a bondservant, but a son; and if a son, then an heir of God through Christ.

However, the son by the handmaid was born according to the flesh, but the son by the free woman was born through promise.

However what does the Scripture say? "Throw out the handmaid and her son, for the son of the handmaid will not inherit with the son of the free woman."