Luke 4:25

But, I tell you, there were plenty of widows in Israel in Elijah's time, when the sky was closed for three years and a half, and there was a great famine all over the land,

Romans 10:9

For if with your lips you acknowledge the message that Jesus is Lord, and with your mind you believe that God raised him from the dead, you will be saved.

Romans 15:9

and causing the heathen to praise God for his mercy; as the Scripture says, "I will give thanks to you for this among the heathen, And sing in honor of your name."

Revelation 11:6

They have the power to shut up the sky, so that no rain will fall during the days when they are prophesying, and they have power to turn the waters into blood and to smite the earth with any plague whenever they please.

Treasury of Scripture Knowledge

Summary

When heaven is shut up, and there is no rain, because they have sinned against thee; if they pray toward this place, and confess thy name, and turn from their sin, when thou afflictest them:

If they pray

Bible References

Heaven

Luke 4:25
But, I tell you, there were plenty of widows in Israel in Elijah's time, when the sky was closed for three years and a half, and there was a great famine all over the land,
Revelation 11:6
They have the power to shut up the sky, so that no rain will fall during the days when they are prophesying, and they have power to turn the waters into blood and to smite the earth with any plague whenever they please.

If they pray

Romans 10:9
For if with your lips you acknowledge the message that Jesus is Lord, and with your mind you believe that God raised him from the dead, you will be saved.
Romans 15:9
and causing the heathen to praise God for his mercy; as the Scripture says, "I will give thanks to you for this among the heathen, And sing in honor of your name."