James 3:10 From the same mouth come blessing and cursing. My brothers and sisters, this ought not to be so.
Eph. 4:29 Let no evil talk come out of your mouths, but only what is useful for building up, as there is need, so that your words may give grace to those who hear.
“With the tongue one can commit numerous great and mighty transgressions such as informing, talebearing, mockery, flattery, and telling lies. But with the tongue, one can also perform limitless acts of virtue.” From the Orhot Tzaddikim (The Ways of the Righteous)