Definition of acquit:
(v) :
(followed by "of", [formerly by "from"]): To set free, release or discharge from an obligation, duty, liability, burden, or from an accusation or charge; - as, the jury acquitted the prisoner of the charge; to find not guilty; (Obsolete, Rare): To pay for; to atone for
"1775: Richard Sheridan, The duenna - His poverty, can you acquit him of that?"