Proverbs 18:19

19 A brother offended is harder to be won than a strong city: and their contentions* are like the bars of a castle.

Proverbs 18:19 In-Context

17 He that is first in his own cause seemeth just; but his neighbour cometh and searcheth him.
18 The lot causeth contentions to cease, and parteth between the mighty.
19 A brother offended is harder to be won than a strong city: and their contentions are like the bars of a castle.
20 A man's belly shall be satisfied with the fruit of his mouth; and with the increase of his lips shall he be filled.
21 Death and life are in the power of the tongue: and they that love it shall eat the fruit thereof.
The King James Version is in the public domain.