13 You shall fear Yahweh your God; and you shall serve him, and shall swear by his name.
*Minor differences ignored. Grouped by changes, with first version listed as example.
Thou shalt fear the Lord thy God. Hence it is more evident why He has just declared that there is One God, viz., that He alone may be undividedly worshipped; for unless our minds are fixed on Him alone, religion is torn, as it were, into divers parts, and this is soon followed by a labyrinth of errors. But, first, he calls for reverence, and then for the worship which may testify and demonstrate it. "Fear" contains in it the idea of subjection, when men devote themselves to God, because His terrible majesty keeps them in their proper place. Hence results worship, which is the proof of piety. But we must observe that the fear enjoined in this passage is voluntary, so that men influenced by it desire nothing more than to obey God. When I stated, therefore, that God brings us under the yoke by a sense of His power and greatness, I did not understand that a violent and servile obedience is extorted from us; I only wished to affirm that men cannot be induced to obey God, before they have been subdued by fear; because their innate corruption always carries with it a contempt for religion, and a spirit of licentiousness. Therefore, in Jeremiah (Jeremiah 5:22), in order to exhort men to fear, He sets forth His terrible power in restraining the strength of the sea; but this fear leads on His true worshippers further. In the other passage which we have subjoined from Deuteronomy 10, the word cleave again confirms the truth, that as soon as men decline from God in the least degree, His worship is corrupted. For this is the meaning of that union with Himself to which He calls His worshippers, that they should be, as it were, glued to Him, and should not look elsewhere.
The command "to swear by His Name" is not inconsistent with the Lord's injunction Matthew 5:34, "Swear not at all." Moses refers to legal swearing, our Lord to swearing in common conversation. It is not the purpose of Moses to encourage the practice of taking oaths, but to forbid that, when taken, they should be taken in any other name than that of Israel's God. The oath involves an invocation of Deity, and so a solemn recognition of Him whose Name is made use of in it. Hence, it comes especially within the scope of the commandment Moses is enforcing.
Thou shalt fear the Lord thy God - Thou shalt respect and reverence him as thy Lawgiver and Judge; as thy Creator, Preserver, and the sole object of thy religious adoration.
And serve him - Our blessed Lord, in Matthew 4:10; Luke 4:8, quotes these words thus: And him Only (αυτῳ μονῳ) shalt thou serve. It appears, therefore, that לבדו lebaddo was anciently in the Hebrew text, as it was and is in the Septuagint, (αυτῳ μονῳ), from which our Lord quoted it. The Coptic preserves the same reading; so do also the Vulgate, (illi soli), and the Anglo-Saxon. Dr. Kennicott argues, that without the word only the text would not have been conclusive for the purpose for which our Lord advanced it; for as we learn from Scripture that some men worshipped false gods in conjunction with the true, the quotation here would not have been full to the point without this exclusive word. It may be proper to observe that the omitted word לבדו lebaddo, retained in the above versions, does not exist in the Hebrew printed text, nor in any MS. hitherto discovered.
Shalt swear by his name - תשבע tishshabea, from שבע shaba, he was full, satisfied, or gave that which was full or satisfactory. Hence an oath and swearing, because appealing to God, and taking him for witness in any case of promise, etc., gave full and sufficient security for the performance; and if done in evidence, or to the truth of any particular fact, it gave full security for the truth of that evidence. An oath, therefore, is an appeal to God, who knows all things, of the truth of the matter in question: and when a religious man takes such an oath, he gives full and reasonable satisfaction that the thing is so, as stated; for it is ever to be presumed that no man, unless in a state of the deepest degradation, would make such an appeal falsely, for this would imply an attempt to make God a party in the deception.
Thou shalt fear the LORD thy God, and serve him, and shalt (f) swear by his name.
(f) We must fear God, serve him only and confess his Name, which is done by swearing lawfully.
Thou shalt fear the Lord thy God, and serve him,.... Serve him through fear; not through slavish fear, a fear of hell and damnation; but through filial fear, a reverential affection for that God that had brought them out of a state of bondage into great and glorious liberty, out of Egypt into Canaan's land, out of a place of misery into a land of plenty; and therefore should fear the Lord and his goodness, and from such a fear of him serve him, in every part of worship, public and private, enjoined; this passage Christ refers to Matthew 4:10.
and shalt swear by his name; when they made a covenant with any, or were called to bear a testimony for the decision of any controversy which could not be otherwise finished; or whenever they took an oath on any account, which should never be taken rashly or on any trivial account, and much less falsely; it should be taken not in the name of any idol, or of any other but the true and living God; the Targum of Jonathan is,"in the name of the Word of the Lord, in truth ye shall swear.''
Shalt swear by his name - When thou hast a call and just cause to swear, not by idols, or any creatures.
*More commentary available at chapter level.