fall on (someone's) sword

Translations
взять вину на (себя)
He decided to fall on his sword and resign to save the company from more scandal.
Он решил взять вину на себя и уйти в отставку, чтобы спасти компанию от дальнейшего скандала.
Definitions
To voluntarily take responsibility for a failure or mistake, often by resigning or accepting blame, even if others were involved or more at fault.
Words
sword

noun
меч
fall

verb
падать
fall on

verb
падать на