28 And we, brethren, as Isaac, are children of promise,
29 but as then he who was born according to the flesh did persecute him according to the spirit, so also now;
30 but what saith the Writing? `Cast forth the maid-servant and her son, for the son of the maid-servant may not be heir with the son of the free-woman;'
31 then, brethren, we are not a maid-servant's children, but the free-woman's.