Leviticus 4:2

Speak unto the children of Israel, saying, if a soul shall sin through ignorance, in an unintentional offense, against any of the commandments of the Lord concerning things which ought not to be done, and shall do against any of them; (the sacrifices enumerated till now were free-will offerings and could be brought even when there was no specific occasion, whenever the heart of the individual prompted him to seek the Lord's fellowship in sacrifice, prayer, and sacrificial meal; but there were times and occasions when certain sacrifices had to be made, as when an unintentional trespass had occurred. This included all sins of weakness, not only such as had been committed in ignorance, haste, and negligence, but also such in which the weakness of the flesh had overcome the good intention of the believer);