In the hadith of abu saeed khudri,said that the prophet(saw)said.
When any one of you witnesses the commission of evil,he should use his hands to prevent it,and if he has not the power to do this,he should use his tongue,and if he has not the power to do even this,he should use the power of his hearts: and this last represents the weakest degree of faith(sahih muslim)
When any one of you witnesses the commission of evil,he should use his hands to prevent it,and if he has not the power to do this,he should use his tongue,and if he has not the power to do even this,he should use the power of his hearts: and this last represents the weakest degree of faith(sahih muslim)