His throat was bleeding profusely and he was taken to hospital for treatment.

No greater story can be found to demonstrate this consuming love for Bahá'u'lláh than that of Hájí Muhammad-Ja'far-i-Tabrízí. He was a devoted believer who first attained the presence of Bahá'u'lláh in Baghdád, recognized His station and devoted his life to the service of his Lord. When Bahá'u'lláh established His residence in Adrianople, Hájí Ja'far travelled with his brother (who was also a believer) to that city and resided there. He was so magnetized by Bahá'u'lláh that when he discovered that the authorities had not included his name among those who were to accompany Bahá'u'lláh to 'Akká, he attempted to cut his own throat. Some friends arrived just in time to save him.

...His throat was bleeding profusely and he was taken to hospital for treatment.

- The Revelation of Bahá'u'lláh, V. 1, by Adib Taherzadeh

http://www.peyman.info/cl/Baha%27i/Others/ROB/V1/p096-104Ch08.html

Haji Ja`far-i-Tabrizi, one of the believers, finding that his name had been omitted from the list of the exiles who might accompany Baha'u'llah, cut his throat with a razor, but was prevented in time from ending his life — an act which Baha'u'llah, in the Suriy-i-Ra'is, characterizes as "unheard of in bygone centuries," and which "God hath set apart for this Revelation, as an evidence of the power of His might";

(God Passes By, 1995, Page 180)

Haji Ja'far... took a razor with him to the outer apartment of the house which was crowded with military officers and government officials, put his head out of a window which opened onto the street, and cut his own throat.

(Taherzadeh 1996, 2: 406)