Matthew 12:34
34 You lbrood of vipers! How can you speak good, when you are evil? mFor out of the abundance of the heart the mouth speaks.
Ephesians 5:4
4 yLet there be no filthiness nor foolish talk nor crude joking, which are out of place, but instead let there be thanksgiving.
James 3:10
10 jFrom the same mouth come blessing and cursing. My brothers,1 these things ought not to be so.