Saul exhibited a pattern of turning to the flesh in order to do something as king of Israel. This was a cause for distress among the people, and it was foolish, just as Samuel told him it was. The commandment of God isn't to do something, even in religion, just to do something. The commandment of God is to believe Christ whom he sent to save his people from their sins. Don't do! Believe on the Lord Jesus Christ and thou shalt be saved.