Revelation 11:6

These have power to shut the heavens, so that no rain may fall in the days of their prophecy: and they have power over the waters to turn them into blood, and to smite the earth with every plague as often as they will.

Luke 4:25

And I assure you, there were many widows in Israel, in the days of Elias, when the heaven was shut up for three years and six months, and there was a great famine through all the land;

James 5:16-18

Confess your faults one to another, and pray for one another, that ye may be healed: the fervent prayer of a righteous man availeth much.

Treasury of Scripture Knowledge

Summary

These have power to shut heaven, that it rain not in the days of their prophecy: and have power over waters to turn them to blood, and to smite the earth with all plagues, as often as they will.

Bible References

Power

Luke 4:25
And I assure you, there were many widows in Israel, in the days of Elias, when the heaven was shut up for three years and six months, and there was a great famine through all the land;
James 5:16
Confess your faults one to another, and pray for one another, that ye may be healed: the fervent prayer of a righteous man availeth much.