N283: That, in capital cases, one who had argued for acquittal, shall not later on argue for condemnation

Maimonides

That, in capital cases, one who had argued for acquittal, shall not later on argue for condemnation, as it is said, “Thou shalt not speak out in a cause, turning aside” (Ex. 23:2).

Exodus 23:2

KJV: Thou shalt not follow a multitude to do evil; neither shalt thou speak in a cause to decline after many to wrest judgment:
ASV: Thou shalt not follow a multitude to do evil; neither shalt thou speak in a cause to turn aside after a multitude to wrest justice:
WEB: “You shall not follow a crowd to do evil. You shall not testify in court to side with a multitude to pervert justice.
JPS: Thou shalt not follow a multitude to do evil; neither shalt thou bear witness in a cause to turn aside after a multitude to pervert justice;