Leviticus 5:1

If a person sins and hears the voice of the oath and she is a witness, or sees it, or knows it, if she does not declare it and is burdened with sin, that is, if she does not declare it, she is burdened with sin. The addition of "and" is a habitual way of expressing oneself from Scripture. But since the meaning is obscure, we have to expose it. It seems that the text means that a man commits a sin if, hearing that someone swears in false and knowing that he swears in false, he is silent. He knows, if he has witnessed the thing about which the oath is taken or if he saw it or knew it, that is, if he knew it in any way, or seeing it with his own eyes or if he told it himself. he made the oath. Well, he could know the thing in that way. Now, between the fear of this sin and the fear of discovering others there is often a non-small test. Because we can prevent the one who is willing to perjure from committing such a great sin, either by reprimanding him or by forbidding him. If he does not pay attention to us, and he swears in falsehood before us about something we know, it is a very difficult question to know if we have to give him away, if to incriminate him also incurs in danger of death. As the text does not say here who should be told, if it is the one to whom it is sworn or the priest or anyone who not only can not persecute him irrogiendo the torture, but can even pray for him, it seems to me that the The person is free even from the bond of sin if he tells those who can take advantage rather than harm the perjurer, or to correct him or to appease God for him, if he himself uses the medicine of confession.

"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 committing so grave a sin. If, however, he does not listen, and he swears in front of us about something that we know is false, a different question arises: should he be exposed—even if, once he is exposed, he comes into danger of death? But Scripture does not say here to whom this wrong should be made known—whether to the one to whom he swears, or to a priest or to someone who not only is unable to proceed against him by imposing a punishment but can even pray for him. It seems to me that one would free oneself even from the bond of sin if he reveals the fact to those who are able to help the perjurer rather than harm him, either by correcting him or by praying to God for him, if he himself uses the remedy of confession.