“If someone sins by failing to testify when he hears a public charge about something he has witnessed, whether he has seen it or learned of it, he shall bear the iniquity.
KJV
And if a soul sin, and hear the voice of swearing, and [is] a witness, whether he hath seen or known [of it]; if he do not utter [it], then he shall bear his iniquity.
ASV
And if any one sin, in that he heareth the voice of adjuration, he being a witness, whether he hath seen or known, if he do not utter it, then he shall bear his iniquity.