Leviticus 5:1

And if a soul sins, and hears the voice of an oath, and is a witness, whether he has seen or known of it; if he does not tell of it, then he shall bear his iniquity.
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Augustine of Hippo

AD 430
“But if a soul should sin or hear the utterance of an oath, and he himself is a witness or sees or knows about it: if he does not make it known, he too will incur sin.” That is, “If he does not make it known, he will incur sin.” The addition of “and” is a common expression in the Scriptures. But this particular meaning, since it is obscure, seems to need an explanation. For it seems to say that a man sins when someone swears falsely in his hearing and he knows that that man is swearing falsely and remains silent. He knows this, if he was a witness to this matter about which an oath was taken, either having seen it or having known about it. That is, in some way he knows it. Either he saw it with his own eyes or the one who swears told him. For thus he could be aware of it. But between fear of this sin and fear of the treachery of men, there often arises no small temptation. For we can call someone back who is prepared to perjure himself by admonishing him or by preventing him from commi...

George Leo Haydock

AD 1849
Swearing. We are accountable for the sins of others, to which we are accessory, as appears from this and part of the following chapter. No distinction of persons is here noticed. If any one, therefore, be witness to another's promise, confirmed by oath, and, being cited to the bar, refuse to speak, he shall be guilty of sin, and offer the sacrifice proscribed (ver. 6,) for all the preceding cases. Restitution must also be made to the injured person. (Menochius) But others suppose that no sacrifice was allowed for such an obstinate wretch as when not answered when the judge swore or adjured him. He was liable to be put to death. The associate of the thief fell under the like punishment as the thief himself, when he would not reveal the theft to the judge, Proverbs xxix. 24. Others again understand this swearing to mean blaspheming God. If the hearer do not reprehend him, he shall suffer as his accomplice. (Origen; Philo) Junius thinks that the neglect of fraternal correction, was to b...

Knowing this first, that no prophecy of the scripture is of any private interpretation - 2 Peter 1:20

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