Some Ans. Questions 2014 by -'Abdu'l-Bahá- 1 Para

Moreover, the mighty and sovereign monarch of a land represents all who inhabit that land; that is, whatsoever he may utter is the word of all, and whatsoever covenant he may conclude is the covenant of all, for the will and purpose of all his subjects is subsumed in his own. Likewise, every Prophet is the representative of the entire body of His followers. Therefore, the covenant that God makes with Him and the words that He addresses to Him apply to all His people (44:3)

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