Acts 8:23
For I perceive that you are in the gall of bitterness, and in the bond of iniquity.
Romans 1:31
without understanding, covenant-breakers, without natural affection, implacable, unmerciful;
2 Timothy 3:3
without natural affection, implacable, false accusers, intemperate, fierce, haters of those who are good,
Hebrews 12:15
taking care, lest any one slight the grace of God; lest any root of bitterness spring up and trouble you, and by this many be defiled;
Revelation 8:10-11
And the third angel sounded; and there fell from heaven a great star, that burned as a lamp; and it fell upon the third part of the rivers, and upon the fountains of waters.