1 Kings 18:43

And he spoke a parable to them to show that they ought to pray always, and not be fainthearted:

And will not God avenge his chosen, who cry to him day and night, though he be slow to punish in their behalf?

praying with all prayer and entreaty at all times in the Spirit; and watching to this end with all perseverance and entreaty for all the saints,

For ye have need of endurance; that, after ye have done the will of God, ye may receive what is promised.

Treasury of Scripture Knowledge

And said to his servant, Go up now, look toward the sea. And he went up, and looked, and said, There is nothing. And he said, Go again seven times.

And he spoke a parable to them to show that they ought to pray always, and not be fainthearted:

And will not God avenge his chosen, who cry to him day and night, though he be slow to punish in their behalf?

praying with all prayer and entreaty at all times in the Spirit; and watching to this end with all perseverance and entreaty for all the saints,

For ye have need of endurance; that, after ye have done the will of God, ye may receive what is promised.

and again he prayed, and the heaven gave rain, and the earth brought forth her fruit.