Is it considered disobedience for a young man to refuse to shave his beard despite his father's insistence, which caused his blood pressure to rise and made him cry, and must he comply with his father's command this time?

We have previously clarified that it is not permissible to obey one's mother in completely shaving off the beard, under the pretext that shaving it would increase its thickness. We also explained the prohibition of shaving the beard in response to parental command or to avoid their anger. Many jurists have permitted trimming what exceeds a fistful of the beard, but no one has permitted taking from the beard less than a fistful, unless it is to remove disfigurement.

If your beard exceeds a fistful, and you wish to obey your father by trimming what exceeds it, there is no harm in that. However, if it is less than a fistful, do not obey him in thinning it. You should deal gently with your father and speak to him kindly. If he commands disobedience, he should not be obeyed in that, but his right to kindness, beneficence, and good companionship must not be forfeited, as Allah Almighty says: "And if they endeavor to make you associate with Me that of which you have no knowledge, do not obey them but accompany them in [this] world with appropriate kindness and follow the way of those who turn back to Me [in repentance]. Then to Me will be your return, and I will inform you about what you used to do."