1 Corinthians 10:10

And do not be discontented, as some of them were, and they were destroyed by the Destroyer.

Philippians 2:14-15

Be ever on your guard against a grudging and contentious spirit,

Jude 1:16

These men are murmurers, ever bemoaning their lot. Their lives are guided by their evil passions, and their mouths are full of big, boastful words, while they treat individual men with admiring reverence for the sake of the advantage they can gain.

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