Seeking barakah from this hair is not permissible and it is a means that may lead to shirk, because it is impossible to prove that it is actually a hair of the Prophet (blessings and peace of Allah be upon him). By the same token, it is not permissible to build a mosque for it and keep it in that mosque, even if we assume for argument’s sake that it is actually a hair of the Prophet (blessings and peace of Allah be upon him) and is proven by an unbroken, sound chain of narration.

1. The biographers and historians differed concerning the day and month of the birth of the Prophet. 2. The strongest opinion concerning the birth of the Prophet (blessings and peace of Allah be upon him) is that he was born between the eighth and the twelfth of Rabee‘ al-Awwal in the Year of the Elephant. 3. The most well-known view is that the death of the Prophet occurred on 12th Rabee‘ al-Awwal 11 AH.