The Kitáb-i-Aqdas - The Most Holy Book
Index term: Conduct
k73.
Adorn yourselves with the raiment of goodly deeds. He whose deeds attain unto God's good pleasure is assuredly of the people of Bahá and is remembered before His throne. Assist ye the Lord of all creation with works of righteousness, and also through wisdom and utterance. Thus, indeed, have ye been commanded in most of the Tablets by Him Who is the All-Merciful. He, truly, is cognizant of what I say. Let none contend with another, and let no soul slay another; this, verily, is that which was forbidden you in a Book that hath lain concealed within the Tabernacle of glory. What! Would ye kill him whom God hath quickened, whom He hath endowed with spirit through a breath from Him? Grievous then would be your trespass before His throne! Fear God, and lift not the hand of injustice and oppression to destroy what He hath Himself raised up; nay, walk ye in the way of God, the True One. No sooner did the hosts of true knowledge appear, bearing the standards of Divine utterance, than the tribes of the religions were put to flight, save only those who willed to drink from the stream of everlasting life in a Paradise created by the breath of the All-Glorious.
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.
n192.
God hath laid hold on him who led thee astray.
A reference to Siyyid Muhammad-i-Isfahání, who is described by Shoghi Effendi as the "Antichrist of the Bahá'í Revelation". He was a man of corrupt character and great personal ambition who induced Mírzá Yahyá to oppose Bahá'u'lláh and to claim prophethood for himself (see note 190). Although he was an adherent of Mírzá Yahyá, Siyyid Muhammad was exiled with Bahá'u'lláh to 'Akká. He continued to agitate and plot against Bahá'u'lláh. In describing the circumstances of his death, Shoghi Effendi has written in God Passes By:

A fresh danger now clearly threatened the life of Bahá'u'lláh. Though He Himself had stringently forbidden His followers, on several occasions, both verbally and in writing, any retaliatory acts against their tormentors, and had even sent back to Beirut an irresponsible Arab convert, who had meditated avenging the wrongs suffered by his beloved Leader, seven of the companions clandestinely sought out and slew three of their persecutors, among whom were Siyyid Muhammad and Áqá Ján.
The consternation that seized an already oppressed community was indescribable. Bahá'u'lláh's indignation knew no bounds. "Were We", He thus voices His emotions, in a Tablet revealed shortly after this act had been committed, "to make mention of what befell Us, the heavens would be rent asunder and the mountains would crumble." "My captivity", He wrote on another occasion, "cannot harm Me. That which can harm Me is the conduct of those who love Me, who claim to be related to Me, and yet perpetrate what causeth My heart and My pen to groan."