柳 下 何 時 泥 鰌 居

柳の下にいつも泥鰌はおらぬ 柳の下に何時も泥鰌は居らぬ

やなぎのしたにいつもどじょうはおらぬ

just because a method works once doesn't mean it will work every time (lit: there aren't always loach under the willow tree)