Example of Hagar and Sarah
21 Tell me, you who desire to be under the law, do you not listen to the law? 22 For it is written that Abraham had two sons, Gen. 16:5one by a slave woman and Gen. 21:2one by a free woman. 23 But ver. 29;[Rom. 9:7] the son of the slave was born according to the flesh, while ver. 28;Gen. 17:16-19;18:10,14;21:1,2;Heb. 11:11the son of the free woman was born through promise. 24 Now this may be interpreted allegorically: these women are two See Rom. 9:4covenants. Deut. 33:2One is from Mount Sinai, bearing children for slavery; she is Hagar. 25 Now Hagar is Mount Sinai in Arabia;4:25 Some manuscripts For Sinai is a mountain in Arabia she corresponds to the present Jerusalem, for she is in slavery with her children. 26 But [Heb. 12:22;Rev. 3:12;21:2,10]the Jerusalem above is free, and she is our mother.