NET
1 “‘When a person sins in that he hears a public curse against one who fails to testify and he is a witness (he either saw or knew what had happened) and he does not make it known, then he will bear his punishment for iniquity.
Darby
1 And if any one sin, and hear the voice of adjuration, and he is a witness whether he hath seen or known [it], if he do not give information, then he shall bear his iniquity.
KJV
1 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.