But when the fullness of time had come, God sent forth his Son, born of woman, born under the law,

For it is written that Abraham had two sons, one by a slave woman and one by a free woman.

But the son of the slave was born according to the flesh, while the son of the free woman was born through promise.

But what does the Scripture say? “Cast out the slave woman and her son, for the son of the slave woman shall not inherit with the son of the free woman.”

So, brothers, we are not children of the slave but of the free woman.