Since the prophet's actions, undertaken on his own initiative, are aimed at fulfilling God's command in the spirit in which it was intended, it may be said that they are done by God's command even if all this is not made explicit within the command. Eliyahu's profound clarification of God's command requires that several actions be inserted in between appearing before Ahav and the giving of rain, all aimed at bringing Israel to teshuva. The choice of these actions is left to the prophet.

Courtesy of the Virtual Beit Midrash, Yeshivat Har Etzion