[shuāng zú chóng jiǎn]   

双    足    重    茧    形容奔走劳苦。

双足重茧，是汉语词汇，出自《淮南子·修务训》，形容奔走劳苦。

With hands and feet covered by thick callosities as a result of hard work

双瞳剪水    双喜临门    双栖双宿    双管齐下    双柑斗酒