Caravaggio, Saint Jerome Writing (c. 1605), Galleria Borghese. Public domain.
2 verses in the King James Version. Word study for “two” →
For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman.
Which things are an allegory: for these are the two covenants; the one from the mount Sinai, which gendereth to bondage, which is Agar.