Genesis 27:9

Go to the flock and get me two of the best young goats. I'll prepare them in a tasty way for your father, just the way he loves them.

Manoah said to the Lord's messenger, "Please stay here awhile, so we can prepare a young goat for you to eat."

So Jesse took a donkey loaded with bread, a container of wine, and a young goat and sent them to Saul with his son David.

Treasury of Scripture Knowledge

Go now to the flock, and fetch me from thence two good kids of the goats; and I will make them savoury meat for thy father, such as he loveth:

Manoah said to the Lord's messenger, "Please stay here awhile, so we can prepare a young goat for you to eat."

So Jesse took a donkey loaded with bread, a container of wine, and a young goat and sent them to Saul with his son David.

So then, it does not depend on human desire or exertion, but on God who shows mercy.