Excerpts from Books and Wikipedia
"The Suriy-i-Mulúk, the most momentous Tablet revealed by Bahá'u'lláh (Surih of Kings) in which He, for the first time, directs His words collectively to the entire company of the monarchs of East and West, and in which the Sultan of Turkey, and his ministers, the kings of Christendom, the French and Persian Ambassadors accredited to the Sublime Porte, the Muslim ecclesiastical leaders in Constantinople, its wise men and inhabitants, the people of Persia and the philosophers of the world are separately addressed; . . . In His message to the kings of the earth, Bahá'u'lláh, in the Suriy-i-Mulúk, discloses the character of His Mission; exhorts them to embrace His Message; affirms the validity of the Báb's Revelation; reproves them for their indifference to His Cause; enjoins them to be just and vigilant, to compose their differences and reduce their armaments; expatiates on His afflictions; commends the poor to their care; warns them that "Divine chastisement" will "assail" them "from every direction," if they refuse to heed His counsels, and prophesies His "triumph upon earth" though no king be found who would turn his face towards Him." [Shoghi Effendi, God Passes By, p. 171]