Baha’u’llah describes what He observed upon returning to Baghdad from Kurdistan

What pen can recount the things We beheld upon Our return! Two years have elapsed during which Our enemies have ceaselessly and assiduously contrived to exterminate Us, whereunto all witness. Nevertheless, none amongst the faithful hath risen to render Us any assistance, nor did any one feel inclined to help in Our deliverance. Nay, instead of assisting Us, what showers of continuous sorrows, their words and deeds have caused to rain upon Our soul! Amidst them all, We stand, life in hand, wholly resigned to His will; that perchance, through God’s loving kindness and His grace, this revealed and manifest Letter may lay down His life as a sacrifice in the path of the Primal Point, the most exalted Word. By Him at Whose bidding the Spirit hath spoken, but for this yearning of Our soul, We would not, for one moment, have tarried any longer in this city. “Sufficient Witness is God unto Us.” We conclude Our argument with the words: “There is no power nor strength but in God alone.” “We are God’s, and to Him shall we return.” 

- Baha’u’llah  (The Kitab-i-Iqan’)