The Sháh demanded that Bahá’u’lláh be delivered inro his hands: - the Russian Minister refused

The Sháh, greatly amazed, dispatched his trusted officers to the Legation, demanding that the Accused be forthwith delivered into his hands. Refusing to comply with the wishes of the royal envoys, the Russian Minister requested Bahá’u’lláh to proceed to the home of the Grand Vizir, to whom he formally communicated his wish that the safety of the Trust the Russian government was delivering into his keeping should be insured. This purpose, however, was not achieved because of the Grand Vizir’s apprehension that he might forfeit his position if he extended to the Accused the protection demanded for Him. 

- Shoghi Effendi  (Chapter 5, 'God Passes By')

Bahá’u’lláh was conducted to the house of His brother-in-law who was acting as secretary to the Russian Minister, Prince Dolgorouki

In the village of Zarkandih He was met by, and conducted to the home of, His brother-in-law, Mírzá Majíd, who, at that time, was acting as secretary to the Russian Minister, Prince Dolgorouki, and whose house adjoined that of his superior. Apprised of Bahá’u’lláh’s arrival the attendants of the Hájibu’d-Dawlih, Hájí ‘Alí Khán, straightway informed their master, who in turn brought the matter to the attention of his sovereign. 

- Shoghi Effendi  (Chapter 5, 'God Passes B'y)

The attempted assassination of the Sháh: - Bahá’u’lláh “rode forth…to the headquarters of the Imperial army”

Bahá’u’lláh, when that attempt had been made on the life of the sovereign, was in Lavásán, the guest of the Grand Vizir, and was staying in the village of Afchih when the momentous news reached Him. Refusing to heed the advice of the Grand Vizir’s brother, Ja‘far-Qulí Khán, who was acting as His host, to remain for a time concealed in that neighborhood, and dispensing with the good offices of the messenger specially dispatched to insure His safety, He rode forth, the following morning, with cool intrepidity, to the headquarters of the Imperial army which was then stationed in Níyávarán, in the Shimírán district. 

- Shoghi Effendi  (Chapter 5, 'God Passes By')

Some of Baha’u’llah’s powerful early enemies

• Already so conspicuous and towering a figure had, through the accusations levelled against Him, kindled the wrath of Muhammad Sháh, who, after having heard what had transpired in Badasht, had ordered His arrest, in a number of farmáns addressed to the kháns of Mázindarán, and expressed his determination to put Him to death.
• Hájí Mírzá Áqásí, previously alienated from the Vazír (Bahá’u’lláh’s father), and infuriated by his own failure to appropriate by fraud an estate that belonged to Bahá’u’lláh, had sworn eternal enmity to the One Who had so brilliantly succeeded in frustrating his evil designs.
• The Amír-Nizám, moreover, fully aware of the pervasive influence of so energetic an opponent, had, in the presence of a distinguished gathering, accused Him of having inflicted, as a result of His activities, a loss of no less than five kurúrs upon the government, and had expressly requested Him, at a critical moment in the fortunes of the Faith, to temporarily transfer His residence to Karbilá.
• Mírzá Áqá Khán-i-Núrí, who succeeded the Amír-Nizám, had endeavored, at the very outset of his ministry, to effect a reconciliation between his government and the One Whom he regarded as the most resourceful of the Báb’s disciples.
• Little wonder that when, later, an act of such gravity and temerity was committed, [the attempted assassination of the Sháh] a suspicion as dire as it was unfounded, should at once have crept into the minds of the Sháh, his government, his court, and his people against Bahá’u’lláh.
• Foremost among them was the mother of the youthful sovereign, who, inflamed with anger, was openly denouncing Him as the would-be murderer of her son. 

- Shoghi Effendi  (Chapter 5, God Passes By)

Some of Baha’u’llah’s character traits

Such a man, with such a record of achievements to His credit, could not, indeed did not, escape either the detection or the fury of a vigilant and fully aroused enemy.

• Afire from the very beginning with an uncontrollable enthusiasm for the Cause He had espoused;
• conspicuously fearless in His advocacy of the rights of the downtrodden;
• in the full bloom of youth;
• immensely resourceful;
• matchless in His eloquence;
• endowed with inexhaustible energy and penetrating judgment;
• possessed of the riches, and enjoying, in full measure, the esteem, power and prestige associated with an enviably high and noble position, and yet contemptuous of all earthly pomp, rewards, vanities and possessions;
• closely associated, on the one hand, through His regular correspondence with the Author of the Faith He had risen to champion, and intimately acquainted, on the other, with the hopes and fears, the plans and activities of its leading exponents;
• at one time advancing openly and assuming a position of acknowledged leadership in the forefront of the forces struggling for that Faith’s emancipation, at another deliberately drawing back with consummate discretion in order to remedy, with greater efficacy, an awkward or dangerous situation;
• at all times vigilant, ready and indefatigable in His exertions to preserve the integrity of that Faith, to resolve its problems, to plead its cause, to galvanize its followers, and to confound its antagonists, Bahá’u’lláh, at this supremely critical hour in its fortunes, was at last stepping into the very center of the stage so tragically vacated by the Báb—a stage on which He was destined, for no less a period than forty years, to play a part unapproached in its majesty, pathos and splendor by any of the great Founders of the world’s historic religions. 

- Shoghi Effendi  (Chapter 5, God Passes By)