Therefore I want you to know that no one speaking by the [power and influence of the] Spirit of God can say, “Jesus be cursed,” and no one can say, “Jesus is [my] Lord,” except by [the power and influence of] the Holy Spirit. 1 CORINTHIANS 12:3 AMP

Conversely…

It is not what goes into the mouth of a man that defiles and dishonors him, but what comes out of the mouth, this defiles and dishonors him.”
MATTHEW 15:11 AMP