[lǚ chuān zhǒng jué]   

履    穿    踵    决    鞋子破了，露出脚后跟。形容很贫苦。

One's boots leaked dreadfully and in both of them there were big holes at the heels

履舄交错    履舃交错    履仁蹈义    履险如夷    履霜之戒