Matthew 12:36
But I tell you that for every careless word that men shall speak they will be held accountable on the day of Judgement.
Luke 8:13
Those on the rock are the people who on hearing the Message receive it joyfully; but they have no root: for a time they believe, but when trial comes they fall away.
Luke 11:24-26
"When a foul spirit has left a man, it roams about in the Desert, seeking a resting-place; but, unable to find any, it says, 'I will return to the house I have left;"
James 3:5
In the same way the tongue is an insignificant part of the body, but it is immensely boastful. Remember how a mere spark may set a vast forest in flames.
2 Peter 2:8
(For their lawless deeds were torture, day after day, to the pure soul of that righteous man--all that he saw and heard whilst living in their midst.)
Revelation 13:5
And there was given him a mouth full of boastful and blasphemous words; and liberty of action was granted him for forty-two months.