Micah 7:5
Put no faith in a friend, do not let your hope be placed in a relation: keep watch on the doors of your mouth against her who is resting on your breast.
Psalm 39:1
I said, I will give attention to my ways, so that my tongue may do no wrong; I will keep my mouth under control, while the sinner is before me.
Psalm 34:13
Keep your tongue from evil, and your lips from words of deceit.
Psalm 71:8
My mouth will be full of your praise and glory all the day.
James 1:26
If a man seems to have religion and has no control over his tongue but lets himself be tricked by what is false, this man's religion is of no value.
James 3:2
For we all go wrong in a number of things. If a man never makes a slip in his talk, then he is a complete man and able to keep all his body in control.