Baha'u'llah as Imam Husayn in dreams of people.

He dreamt he had attained the presence of Bahá’u’lláh— even though he had not met Bahá’u’lláh up to that time. In his dream he threw himself at Bahá’u’lláh’s feet, who told him, “We protected you so you could visit Us alive.” Hájí responded that he had neither any money nor the energy to move. Bahá’u’lláh told him, “But you have reliance (on God),” to which he responded in the affirmative.

When he woke up, he noticed, to his surprise, a caravan tented nearby, having Karbilá as their destination. Then he saw a man leaving the tent, coming directly toward him, telling him to follow. After he entered the tent, he saw a handsome man addressing him respectfully, saying; “Last night I dreamt of Imám Husayn who pointed you out to me and bid me to have you as my guest all the way to Karbilá.” So he gave Hájí a horse and provisions and they all headed out toward Karbilá. The man did not even ask Hájí’s name and particulars, and Hájí arrived in Baghdád in utmost comfort and ease. There he separated from his host, telling him; “He who came to your dream came to my dream as well and bid me to go to Baghdád.” The host, overcome with great joy, exclaimed that he had been told to offer hospitality all the way to Baghdád and not Karbilá.

So Hájí was able to attain the presence of Báha’u’lláh, realizing he was exactly the personage he had seen in his dream. Bahá’u’lláh showered Hájí with bounties.

From Málmírí’s Memoirs, A Treasury of Bahá’í Stories

Ref. Sweet and Enchanting Stories, Aziz Rohani, Page 149
http://bahai-library.com/pdf/r/rohani_sweet_enchanting_stories.pdf