Usage of the character 墻
qiáng
墙
[墻]
- variant of 牆／墙 (qiáng)
xiōngdìxìyúqiáng,wàiyùqíwǔ
兄弟阋于墙，外御其侮
[兄弟鬩於墻，外禦其侮]
- internal disunity dissolves at the threat of an invasion from outside (idiom)