The Kitáb-i-Aqdas - The Most Holy Book
Index term: wearing of, under Silk
k159.
It hath been forbidden you to carry arms unless essential, and permitted you to attire yourselves in silk. The Lord hath relieved you, as a bounty on His part, of the restrictions that formerly applied to clothing and to the trim of the beard. He, verily, is the Ordainer, the Omniscient. Let there be naught in your demeanour of which sound and upright minds would disapprove, and make not yourselves the playthings of the ignorant. Well is it with him who hath adorned himself with the vesture of seemly conduct and a praiseworthy character. He is assuredly reckoned with those who aid their Lord through distinctive and outstanding deeds.
n174.
and permitted you to attire yourselves in silk
According to Islamic practice, the wearing of silk by men was generally forbidden, except in times of holy war. This prohibition, which was not based on the verses of the Qur'án, was abrogated by the Báb.