Does shaving the beard diminish the reward of acts of worship such as prayer and fasting, even if the Muslim performs them perfectly?

Shaving the beard is unlawful according to the more preponderant opinion, and one must repent from it and cease doing it. There is no explicit evidence that the worship of someone who shaves his beard is less rewarded if it meets the conditions of validity, sincerity, and humility. Some scholars have mentioned that the obedience of a pious person holds a greater rank than the obedience of someone who commits sins.