The most common reference to this topic is the book Prayer Rain , authored by Dr. Daniel Olukoya , the founder of [11, 17, 22].
In a metaphorical sense, "rain" often represents the or favor [8, 18, 30].
Based on the example of Elijah on Mount Carmel , Christians pray for rain both physically (for crops) and spiritually (for revival) [13, 31]. It is often seen as an act of humility and dependence on God [5, 32].