Proverbs 3:30
"Strive not with a man without cause, if he have done thee no harm."
Cross References (ranked by relevance)
2 Timothy 2:24
And the servant of the Lord must not strive; but be gentle unto all men, apt to teach, patient,
Proverbs 29:22
An angry man stirreth up strife, and a furious man aboundeth in transgression.
Proverbs 18:6
A fool’s lips enter into contention, and his mouth calleth for strokes.
Proverbs 17:14
The beginning of strife is as when one letteth out water: therefore leave off contention, before it be meddled with.