Shaving the beard is nothing but aberrance—a departure from the guidance of the Messenger of Allah ﷺ.
Allah the Exalted says, “Whoever obeys the Messenger has truly obeyed Allah, but whoever turns away—We have not sent you as their keeper.” ⦗al-Nisāʾ 4:80⦘.
Since the Prophet’s ﷺ practice—by word, deed, and physical description—was to leave the beard to grow, removing it is to spurn his noble way and to disdain his honored sunnah. He ﷺ said, “…Whoever turns away from my sunnah is not of me.” ⦗Agreed upon⦘.
He ﷺ also said, “Whoever performs an act that is not in accordance with our instruction, it will be rejected.” ⦗Narrated by Muslim⦘.
And he ﷺ said, “He is not one of us who follows a practice other than ours.” ⦗Classified as sound⦘.
When Chosroes sent two men to the Prophet ﷺ, they entered upon him clean-shaven with long mustaches. The Messenger of Allah ﷺ recoiled from looking at them and asked, “Woe to you! Who ordered you to do this?” They replied, “Our lord commanded us”—meaning Chosroes. The Messenger of Allah ﷺ then said: