過ちては則ち改むるに憚ること勿れ

あやまちてはすなわちあらたむるにはばかることなかれayamachitehasunawachiaratamurunihabakarukotonakare

expression

1. when you make a mistake, don't hesitate to correct it
2. do not delay in making amends for your wrongs

Study it in Yanamino