《资治通鉴·后汉纪·后汉纪四》
吏部侍郎张允，家产数以万计，但生性吝啬，即使是妻子也不肯放手，总是把全部钥匙系在自己衣服底下，走起路来丁当作响如同佩带玉环。
吏部侍郎张允，家赀以万计，而性吝，虽妻亦不之委，常自系众钥于衣下，行如环佩。
Zhang Yun, the minister of personnel, owned tens of thousands in assets. However, he was very stingy and would not even give the keys to his wife. Instead, he always had the keys tied around his waist, which would jingle like a jade ring as he walked.