Acts 8:23
for I perceive that thou art in the gall of bitterness and bond of iniquity.
Romans 1:31
covenant-breakers, without natural affection, implacable, and unmerciful:
2 Timothy 3:3
without natural affection, perfidious, false accusers, intemperate, savage, enemies to the good, traitors,
Hebrews 12:15
looking to it, least there be any one falling short of the grace of God, least any root of bitterness springing up should be troublesome, and by it many be defiled:
Revelation 8:10-11
And the third angel sounded, and there fell from heaven a great star burning like a torch, and it fell upon a third part of the rivers, and the fountains of waters: and the name of the star is Wormwood;