(Genesis, xxii.14)

The saints should never be dismay'd,
Nor sink in hopeless fear;
For when they least expect His aid,
The Saviour will appear.

This Abraham found: he raised the knife;
God saw, and said, "Forbear!
Yon ram shall yield his meaner life;
Behold the victim there."

Once David seem'd Saul's certain prey;
But hark! the foe's at hand;
Saul turns his arms another way,
To save the invaded land.

When Jonah sunk beneath the wave,
He thought to rise no more;
But God prepared a fish to save,
And bear him to the shore.

Blest proofs of power and grace divine,
That meet us in His word!
May every deep-felt care of mine
Be trusted with the Lord.

Wait for His seasonable aid,
And though it tarry, wait:
The promise may be long delay'd,
But cannot come too late.

William Cowper

http://www.poemhunter.com/poem/jehovah-jireh-the-lord-will-provide/