'Son' in the Bible

to reveal his Son in me in order that I would proclaim the gospel [about] him among the Gentiles, immediately I did not consult with flesh and blood,

and I no longer live, but Christ lives in me, and that [life] I now live in the flesh, I live by faith in the Son of God, who loved me and gave himself for me.

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

And because you are sons, God sent out the Spirit of his Son into our hearts, crying out, "Abba! (Father!),"

so that you are no longer a slave but a son, and if a son, also an heir through God.

But what does the scripture say? "Drive out the female slave and her son, for the son of the female slave will never inherit with the son" of the free woman.