That the Scriptures have only one sense is evident: (I) from the unity of truth—because truth is only one and simple and therefore cannot admit many senses without becoming uncertain and ambiguous; (2) from the unity of form— because there is only one essential form of any one thing (now the sense is the form of the Scriptures); (3) from the perspicuity of the Scriptures, which cannot allow various foreign and diverse senses.https://www.reformowani.info/wp-content/uploads/2022/10/Institutes-of-Elenctic-Theology-Francis-Turretin-vol-1.pdf
We thus think that only one true and genuine sense belongs to the Scriptures. That sense may be twofold: either simple or compound. Simple and historical is that which contains the declaration of one thing without any other signification; as the precepts, the doctrines and the histories. And this again is twofold, either proper and grammatical or figurative and tropical; proper, arising from the proper words; tropical, from figurative words. https://www.reformowani.info/wp-content/uploads/2022/10/Institutes-of-Elenctic-Theology-Francis-Turretin-vol-1.pdf