Galatians 2:4; Galatians 4:22; Galatians 4:27; Galatians 6:4; Galatians 6:10

4 But it was because of the false brethren secretly brought in, who had sneaked in to spy out our liberty which we have in Christ Jesus, in order to bring us into bondage.
22 For it is written that Abraham had two sons, one by the bondwoman and one by the free woman.
27 For it is written, "REJOICE, BARREN WOMAN WHO DOES NOT BEAR; BREAK FORTH AND SHOUT, YOU WHO ARE NOT IN LABOR; FOR MORE NUMEROUS ARE THE CHILDREN OF THE DESOLATE THAN OF THE ONE WHO HAS A HUSBAND."
4 But each one must examine his own work, and then he will have reason for boasting in regard to himself alone, and not in regard to another.
10 So then, while we have opportunity, let us do good to all people, and especially to those who are of the household of the faith.