King James Bible
Again, ye have heard that it hath been said by them of old time, Thou shalt not forswear thyself, but shalt perform unto the Lord thine oaths:

American Standard Version
Again, ye have heard that it was said to them of old time, Thou shalt not forswear thyself, but shalt perform unto the Lord thine oaths:

Young's Literal Translation
'Again, ye heard that it was said to the ancients: Thou shalt not swear falsely, but thou shalt pay to the Lord thine oaths;

Matthew 5:33 Additional Translations
Clarke's Commentary on the Bible

Thou shalt not forswear thyself - They dishonor the great God, and break this commandment, who use frequent oaths and imprecations, even in reference to things that are true; and those who make vows and promises, which they either cannot perform, or do not design to fulfill, are not less criminal. Swearing in civil matters is become so frequent, that the dread and obligation of an oath are utterly lost in it. In certain places, where oaths are frequently administered, people have been known to kiss their thumb or pen, instead of the book, thinking thereby to avoid the sin of perjury; but this is a shocking imposition on their own souls. See the notes on Deuteronomy 4:26; Deuteronomy 6:13.

Perform unto the Lord thine oaths - The morality of the Jews on this point was truly execrable: they maintained, that a man might swear with his lips, and annul it in the same moment in his heart. Rab. Akiba is quoted as an example of this kind of swearing. See Schoettgen.

Treasury of Scripture Knowledge

it hath.

Matthew 23:16 Woe to you, you blind guides, which say, Whoever shall swear by the temple, it is nothing...

Thou.

Exodus 20:7 You shall not take the name of the LORD your God in vain; for the LORD will not hold him guiltless that takes his name in vain.

Leviticus 19:12 And you shall not swear by my name falsely, neither shall you profane the name of your God: I am the LORD.

Numbers 30:2 If a man vow a vow to the LORD, or swear an oath to bind his soul with a bond; he shall not break his word...

*etc:

Deuteronomy 5:11 You shall not take the name of the LORD your God in vain: for the LORD will not hold him guiltless that takes his name in vain.

Deuteronomy 23:23 That which is gone out of your lips you shall keep and perform; even a freewill offering...

Psalm 50:14 Offer to God thanksgiving; and pay your vows to the most High:

Psalm 76:11 Vow, and pay to the LORD your God: let all that be round about him bring presents to him that ought to be feared.

Ecclesiastes 5:4-6 When you vow a vow to God, defer not to pay it; for he has no pleasure in fools: pay that which you have vowed...

Nahum 1:15 Behold on the mountains the feet of him that brings good tidings, that publishes peace! O Judah, keep your solemn feasts...

Matthew 5:33 Parallel Commentaries
Ago Ancients Break Effect False. Falsely Fulfill Heard Oath Oaths Perform Render Swear Sworn Thyself Time VowsAgo Ancients Break Effect False. Falsely Fulfill Heard Oath Oaths Perform Render Swear Sworn Thyself Time VowsTHE HOLY BIBLE, NEW INTERNATIONAL VERSION®, NIV® Copyright © 1973, 1978, 1984, 2011 by Biblica®.

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