Some Ans. Questions 1908 by -'Abdu'l-Bahá- 1 Para

Afterward it is said: "These have power to shut heaven, that it rain not in the days of their prophecy,"l meaning that in that cycle they would be like kings. The law and teachings of Muhammad, and the explanations and commentaries of 'Ali, are a heavenly bounty; if they wish to give this bounty, they have power to do so. If they do not wish it, the rain will not fall: in this connection rain stands for bounty (50:1)

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