《老子》:“天网恢恢，疏而不失。”《魏书·任城王传》:“天网恢恢，疏而不漏。”

释义：天道公平，作恶就要受到惩罚，它看起来似乎很不周密，但最终不会放过一个坏人。比喻作恶的人终究逃脱不了天法的惩处。出自《老子》。

fig. the way of Heaven is fair, but the guilty will not escape; you can't run from the long arm of the law; lit. heaven's net has wide meshes, but nothing escapes it (idiom, from Laozi 73)