'Wrong doing' in the Bible

Or, have you not read in the law of Moses that the priests in the Temple defiled the Sabbath day [i.e., by doing the 'work' of offering sacrifices] and were not held guilty [of wrongdoing]? [See Num. 28:9-10]

If you had [fully] understood what this means: 'I desire mercy and not [only] sacrifice,' you would not have condemned someone who was not guilty [of wrongdoing].