The Báb orally assured some of His followers that they would personally meet Baha’u’llah

Some of His disciples the Báb assiduously prepared to expect the imminent Revelation. Others He orally assured would live to see its day. To Mulla Baqir, one of the Letters of the Living, He actually prophesied, in a Tablet addressed to him, that he would meet the Promised One face to face. To Sayyah, another disciple, He gave verbally a similar assurance. Mulla Husayn He directed to Tihran, assuring him that in that city was enshrined a Mystery Whose light neither Hijaz nor Shiraz could rival. Quddus, on the eve of his final separation from Him, was promised that he would attain the presence of the One Who was the sole Object of their adoration and love. To Shaykh Hasan-i-Zunuzi He declared while in Mah-Ku that he would behold in Karbila the countenance of the promised Husayn. On Dayyan He conferred the title of "the third Letter to believe in Him Whom God shall make manifest," while to Azim He divulged, in the Kitáb-i-Panj-Sha'n, the name, and announced the approaching advent, of Him Who was to consummate His own Revelation. 

- Shoghi Effendi  (‘God Passes By’)