What are the proofs for the prohibition of shaving beards, and what is the authenticity of the claim that the Prophet, peace and blessings be upon him, had a magnificent beard? And why did Al-Huwayni weaken Imam Muslim's hadith regarding ten acts of fitra, and does that mean that the beard is not among them?

The question regarding the misconceptions about the exemption from growing a beard has been raised repeatedly, and the questioner had previously brought it up in earlier questions, which were answered.

As for the description of the beard of the Messenger of Allah, peace and blessings be be upon him, it was thick.

Regarding the hadith "Ten acts are from the Fitra (natural disposition)": although it is in Sahih Muslim, some imams, such as An-Nasa'i, Al-Uqayli, Ad-Daraqutni, and Ibn Abd al-Barr, have deemed it weak. This weakening, however, does not mean that the beard is not among the characteristics of the Fitra.

Even if we concede that the default for the Sunan of Fitra is that they are recommendations unless there is an indicator to the contrary, many texts have been narrated obligating the growing and lengthening of the beard. The inference based on conjunction (dalalat al-iqtiran) is weak and not considered a proof by most jurists of Usul al-Fiqh.

The reasoning mentioned in the texts for commanding the growing of beards is to differ from the polytheists and because it is among the practices of the prophets.

A Muslim should submit and comply with the Shariah ruling even if the wisdom behind it is not known, for not every Shariah ruling has a known reason for people, and the reasons derived may be deficient. The primary reason is the revelation of the Shariah itself. Ibn Uthaymeen said: "The prohibition and the command of the Prophet, peace and blessings be upon him, is the reason for the believer." A person's inquiry about the wisdom is permissible if the intention is to gain knowledge, but forbidden if the intention is to accept only if it aligns with one's desires.