◆馬を買わんと欲して、まず牛を問う Uma wo kawanto hosshite, mazu ushi wo tou.
- 解釈：高価な物、相場のわからない物を買うときには、まず身近な物の値段を尋ね、その店の掛け値を知れという教え。「馬を問わんと欲してまず牛を問う」とも。
- Literal：He would like to buy a horse and a cow is asked first.
- Interpretation：Investigate an ordinary thing to know worth of a thing.
- 類義：