Kitab-i-Iqan — Paragraph 60
Source (Persian)
حال ناظر به اين فتنه کبری و امتحان اعظم شويد. و از همه گذشته، همان جوهر روح که در ميان قوم به نسبت بی پدری معروف بوده او را پيغمبری بخشيد و حجّت خود نمود بر کلّ اهل سماوات و ارض.
Translation
And now, meditate upon this most great convulsion, this grievous test. Notwithstanding all these things, God conferred upon that essence of the Spirit, Who was known amongst the people as fatherless, the glory of Prophethood, and made Him His testimony unto all that are in heaven and on earth.