Parallel
Proverbs 18:19
Swete's Septuagint · Berean Standard Bible
ἀδελφὸς ὑπὸ ἀδελφοῦ βοηθούμενος ὡς πόλις ὀχυρὰ καὶ ὑψηλή, ἰσχύει δὲ ὥσπερ τεθεμελιωμένον βασίλειον.
An offended brother is harder to win than a fortified city, and disputes are like the bars of a castle.