Eliyahu’s command to Ahav to eat might signify the end of a fast that was declared due to the drought. Alternatively, it might signify Ahav’s identification with the killing of the prophets of Ba’al, thus warranting the downpour. There is no explicit prophecy that the rain will fall immediately, but Eliyahu believes the timing is right and he has faith in God and promises rain. The lack of the explicit prophecy demands that Eliyahu pray for the rain he promised.

Courtesy of the Virtual Beit Midrash, Yeshivat Har Etzion