Revelation 11:6

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

Luke 4:25

But I tell you in truth, that there were many widows in Israel in the days of Elijah, when the heaven was shut up three years and six months, and there was a great famine throughout all the land;

James 5:16-18

Confess your trespasses to one another, and pray for one another, that ye may be healed. The earnest 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
But I tell you in truth, that there were many widows in Israel in the days of Elijah, when the heaven was shut up three years and six months, and there was a great famine throughout all the land;
James 5:16
Confess your trespasses to one another, and pray for one another, that ye may be healed. The earnest prayer of a righteous man availeth much.