“Call out to Zion, O Carmel,” writes Bahá’u’lláh, “and announce the joyful tidings: ‘He that was hidden from mortal eyes is come! His all-conquering sovereignty is manifest; His all-encompassing splendor is revealed… Hasten forth and circumambulate the City of God that hath descended from heaven—the celestial Kaaba round which have circled in adoration the favored of God, the pure in heart and the company of the most exalted angels.
(‘The Dispensation of Baha’u’llah; included in ‘The World Order of Baha’u’llah’)