Then God said, ‘Let there be light’; and there was light.
And God said, ‘Let there be a dome in the midst of the waters, and let it separate the waters from the waters.’
And God said...
The world came to be.
Then God said, ‘Let us make humankind* in our image, according to our likeness.
That's the opening to the Gospel of John.
"There is one whose rash words are like sword thrusts, but the tongue of the wise brings healing." Proverbs 12:18
A gentle tongue is a tree of life, but perverseness in it breaks the spirit. Proverbs 15:4
Keep your tongue from evil and your lips from speaking deceit. Ps 34:13
Your tongue plots destruction, like a sharp razor, you worker of deceit. Ps 52:2
The NT carries on the tradition:
Like this from Jesus: "Do you not see that whatever goes into the mouth passes into the stomach and is expelled? But what comes out of the mouth proceeds from the heart, and this defiles a person."
To fail to recognize this is foolishness. To refuse to be responsible for one's harmful words is sin.