Honi soit qui mal y pense
From Longman Dictionary of Contemporary EnglishHoni soit qui mal y penseHon‧i soit qui mal y pense /ˌɒni swɑː kiː ˌmæl iː ˈpɒns $ ˌɑːn- -ˈpɑːns/ French the motto (=special saying) of the Order of the Garter. It means ‘Let anyone who thinks bad things about it be ashamed.’