"Fear God, O concourse of kings, and suffer not yourselves to be deprived of this most sublime grace."

"O kings of the earth! Give ear unto the Voice of God, calling from this sublime, this fruit-laden Tree, that hath sprung out of the Crimson Hill, upon the holy Plain, intoning the words: “There is none other God but He, the Mighty, the All-Powerful, the All-Wise.” This is a Spot which hath been sanctified by God for those who approach it, a Spot wherein His Voice may be heard from the celestial Tree of Holiness. Fear God, O concourse of kings, and suffer not yourselves to be deprived of this most sublime grace. Fling away, then, the things ye possess, and take fast hold on the Handle of God, the Exalted, the Great. Set your hearts towards the Face of God, and abandon that which your desires have bidden you to follow, and be not of those who perish."

Bahá’u’lláh 

(The Summons of the Lord of Hosts)