'Sons' in the Bible

then understand that those who have faith are Abraham’s sons.

for you are all sons of God through faith in Christ Jesus.

To redeem them that were under the law, that we might receive the adoption of sons.

And because ye are sons, God hath sent forth the Spirit of his Son into your hearts, crying, Abba, Father.

For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman.