Luke 4:25

But it is true when I tell you, [while] there were many widows [living] in Israel during the time of Elijah, when it did not rain for three and a half years, causing a great famine over the entire land,

Romans 10:9

So, if you profess with your lips that Jesus is Lord and believe with your heart that God raised Him from the dead, you will be saved.

Romans 15:9

and so that the Gentiles [also] may honor God for His mercy, as it is written [Psa. 18:49], "Therefore, I will praise you among the Gentiles and sing to your name." [Note: Paul here accommodates the words of King David by applying them to Jews participating with Gentiles in praising God as part of the one body].

Revelation 11:6

These witnesses have the authority to shut the sky up so that it does not rain during the time they are prophesying. And they have the authority to turn the waters into blood, and to strike the earth with every kind of plague whenever they want to.

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 it is true when I tell you, [while] there were many widows [living] in Israel during the time of Elijah, when it did not rain for three and a half years, causing a great famine over the entire land,
Revelation 11:6
These witnesses have the authority to shut the sky up so that it does not rain during the time they are prophesying. And they have the authority to turn the waters into blood, and to strike the earth with every kind of plague whenever they want to.

If they pray

Romans 10:9
So, if you profess with your lips that Jesus is Lord and believe with your heart that God raised Him from the dead, you will be saved.
Romans 15:9
and so that the Gentiles [also] may honor God for His mercy, as it is written [Psa. 18:49], "Therefore, I will praise you among the Gentiles and sing to your name." [Note: Paul here accommodates the words of King David by applying them to Jews participating with Gentiles in praising God as part of the one body].