Baha'u'llah lived for a time as a Sufi and picked up ideas from his Naqshbandi teachers

Baha'u'llah lived for a time as a Sufi and picked up ideas from his Naqshbandi teachers in Kurdistan, Baghdad, and possibly elsewhere (see Cole 1984) He had earlier had an affiliation to the Iranian Ni'matullahi brotherhood. Many of his writings are saturated with Sufi belief, just as the Bab’s are filled with occult and magical conceits.

-Denis MacEoin, Making the invisible visible: introductory books on the Baha'i religion (the Baha'i Faith)

www.tandfonline.com/doi/abs/10.1080/0048721X.2012.705975