Romans 10:9-10

Confess with your mouth that 'Jesus is Lord,' believe in your heart that God raised him from the dead, and you will be saved;

James 3:5-6

So the tongue is a small member of the body, but it can boast of great exploits. What a forest is set ablaze by a little spark of fire!

2 Peter 2:18

By talking arrogant futilities they beguile with the sensual lure of fleshly passion those who are just escaping from the company of misconduct ??19 promising them freedom, when they are themselves enslaved to corruption (for a man is the slave of whatever overpowers him).

Revelation 3:10

Because you have kept the word of my patient endurance, I will keep you safe through the hour of trial which is coming upon the whole world to test the dwellers on earth.

Revelation 12:11

But they have conquered him by the blood of the Lamb and by the word of their testimony; they had to die for it, but they did not cling to life.

Revelation 15:5-6

After that I looked, and the temple of the tabernacle of testimony in heaven was thrown open,

Treasury of Scripture Knowledge

Summary

In the mouth of the foolish is a rod of pride: but the lips of the wise shall preserve them.

Bible References

But

Romans 10:9
Confess with your mouth that 'Jesus is Lord,' believe in your heart that God raised him from the dead, and you will be saved;
Revelation 3:10
Because you have kept the word of my patient endurance, I will keep you safe through the hour of trial which is coming upon the whole world to test the dwellers on earth.
Revelation 12:11
But they have conquered him by the blood of the Lamb and by the word of their testimony; they had to die for it, but they did not cling to life.