兄弟阋于墙，外御其侮
xiōng dì xì yú qiáng , wài yù qí wǔ
internal disunity dissolves at the threat of an invasion from outside (idiom)
ReviewReviewxiōng dì xì yú qiáng , wài yù qí wǔ
internal disunity dissolves at the threat of an invasion from outside (idiom)