And the horses have passed the end of their strength.

I was very nearly at the end of my strength.

But eventually they both reached the end of their strength.

Now, they were at the end of their strength and would spend the night in the open.

And he was almost to the end of his own strength.

More than once, she felt herself at the very end of her strength.

It had cost him, this fight, and she could see he was near the end of his strength.

In all events, we were very near the end of our strength.

"I don't have anything for you," she finished as if she'd reached the end of her strength.

At the end of his strength, Cain got himself inside.