秋毫无犯（秋毫無犯）　

◎ 秋毫无犯 qiūháo-wúfàn

[(of high disciplined troops) not commit the slightest offence against the civilians] 秋毫:动物入秋新换的绒毛,比喻纤细之物。丝毫不侵犯。喻指军纪严明

持军整齐,秋豪(毫)无犯。——《后汉书·岑彭传》