'Son' in the Bible

to reveal His Son in me so that I might preach Him among the Gentiles, I did not immediately consult with flesh and blood,

I have been crucified with Christ; and it is no longer I who live, but Christ lives in me; and the 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 forth His Son, born of a woman, born under the Law,

Because you are sons, God has sent forth the Spirit of His Son into our hearts, crying, “Abba! Father!”

Therefore you are no longer a slave, but a son; and if a son, then an heir through God.

But the son by the bondwoman was born according to the flesh, and the son by the free woman through the promise.

But what does the Scripture say?“Cast out the bondwoman and her son,For the son of the bondwoman shall not be an heir with the son of the free woman.”