Galatians 4:31 YLT

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.