Luke 4:25

But I tell you in truth that there was many a widow in Israel in the time of Elijah, when there was no rain for three years and six months and there came a severe famine over all the land;

Romans 10:9

that if with your mouth you confess Jesus as Lord and in your heart believe that God brought Him back to life, you shall be saved.

Romans 15:9

and that the Gentiles also have glorified God in acknowledgment of His mercy. So it is written, "For this reason I will praise Thee among the Gentiles, and sing psalms in honour of Thy name."

Revelation 11:6

They have power given to them to seal up the sky, so that no rain may fall so long as they continue to prophesy; and power over the waters to turn them into blood, and to smite the earth with various plagues whenever they choose to do so.

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 in truth that there was many a widow in Israel in the time of Elijah, when there was no rain for three years and six months and there came a severe famine over all the land;
Revelation 11:6
They have power given to them to seal up the sky, so that no rain may fall so long as they continue to prophesy; and power over the waters to turn them into blood, and to smite the earth with various plagues whenever they choose to do so.

If they pray

Romans 10:9
that if with your mouth you confess Jesus as Lord and in your heart believe that God brought Him back to life, you shall be saved.
Romans 15:9
and that the Gentiles also have glorified God in acknowledgment of His mercy. So it is written, "For this reason I will praise Thee among the Gentiles, and sing psalms in honour of Thy name."