1 Petro 3:16

mkizitunza dhamiri zenu ziwe safi, ili wale wasemao mabaya dhidi ya mwenendo wenu mzuri katika Kristo waaibike kwa ajili ya masingizio yao.

Having a good conscience; that, whereas they speak evil of you, as of evildoers, they may be ashamed that falsely accuse your good conversation in Christ.