'Writing' in the Bible

and the Writing having foreseen that by faith God doth declare righteous the nations did proclaim before the good news to Abraham --

but the Writing did shut up the whole under sin, that the promise by faith of Jesus Christ may be given to those believing.

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;'