[Magistrate’s to punish idolatry, as keeper of two tables of the law].
“And this is the cause (I conceive) why great Divines have said the object of the Magistrates power as a Magistrate is the externall man, and earthly things, because he doth not in such a spirituall way of working, take care of the two Tables of the Law, as the Pastor doth; and yet the spirituall good and edification of the Church in the right preaching of the Word, Sacraments, and pure discipline is his end. It is true, whether the blashemer professe repentance, or not, the Magistrate is to punish, yea and to take his life, if he in seducing of many, have prevailed, but yet his end is edification, even in taking away the life; for he is to put away evill, that all Israel may feare, and doe so no more; but this edification is procured by the sword, and by a coactive power, and so the Church power and the kingly power differ in their formall objects, and their formall ends.”
Samuel Rutherford ** 1600 – 1661, The Due Right of Presbyteries or, A Peacable Plea, etc. Lon 1644. p. 398
[Deut. 17; Magistrate’s to read the law].
” It is true as King hee is oblieged to read continually in the booke of the Law of God, Deut. 17. and to know what is truth, what heresie, in so farre as hee commandeth that Pastors preach sound doctrine, and that as a Judge hee is to punish heresie.”
ibid., p. 429
[Punishment requires witnesses for all Old Testament crimes which are perpetual as to equity].
” It is clear the question must be thus stated, for all the lawes of the old Testament (which we hold in their Morall equitie to be perpetuall) that are touching blasphemies, heresies, solicitation to worship false Gods and the breach of which the Godly Magistrate was to punish, command or forbid onely such things as may be proved by two or three witnesses, and which husband and wife are not to conceal, and from which all Israel must abstain for fear of the like punishment. Deut. 13.8,9,10,11; Deut. 17.5,6; Levit. 20.1,2,3,4,5. But opinions in the minde, acts of the understanding, can never be proved by witnesses and such as neither Magistrates nor Church can censure.”
Samuel Rutherford, A Free Disputation Against Pretended Liberty of Conscience etc… (Lon-1649). p. 47
Note how Rutherford believes in the laws equity but he doesn’t use the word ‘equity’ to disestablish the continuity of the case law.