...if anyone utters with his lips a rash oath to do evil or to do good, any sort of rash oath that people swear, and it is hidden from him, when he comes to know it, and he realizes his guilt in any of these...
Leviticus 5:4
This is talking about accidental oaths and vows. "How is it possible to make an accidental or unknown oath" you ask?
Answer: Do you always read the details of every End User License Agreement? Do you always control your tongue in a moment of surprise or anger?
https://www.bitchute.com/video/30f4zaMAKnN6/
If anyone sins in that he hears a public adjuration to testify, and though he is a witness, whether he has seen or come to know the matter, yet does not speak, he shall bear his iniquity.
#leviticus 5:1
You are not allowed to be silent about a crime. (A real crime, of course, not the made-up, politically motivated nonsense that fills most man-made law books.) If you have knowledge of the facts, you have a moral obligation to be a witness. #vayikra