Targum zu Wajikra 19:16

Thou shalt not go after the slanderous tongue, which is cruel as a sword that killeth with its two edges in uttering false accusations to afflict thy people. Thou shalt not hinder the acquittal of thy neighbour in witnessing against him in the judgment: I am the Lord.

My people of the house of Israel, follow not the slanderous tongue against your neighbour, nor be silent about thy neighbour's blood, what time in the judgment thou knowest the truth: so speaketh the Lord.