How Tahirih was convinced that the Bab’s message was truth?

One night when it was getting along toward dawn she laid her head on her pillow, lost all awareness of this earthly life, and dreamed a dream; in her vision a youth, a Siyyid, wearing a black cloak and a green turban, appeared to her in the heavens; he was standing in the air, reciting verses and praying with his hands upraised. At once, she memorized one of those verses, and wrote it down in her notebook when she awoke. After the Bab had declared His mission, and His first book, “The Best of Stories,”6 was circulated, Tahirih was reading a section of the text one day, and she came upon that same verse, which she had noted down from the dream. Instantly offering thanks, she fell to her knees and bowed her forehead to the ground, convinced that the Bab’s message was truth.

- Táhirih in History: Perspectives on Qurratu'l-'Ayn from East and West, By Jan T. Jasion