'Stronger' in the Bible

and the Lord said to her, "Two nations are in your womb, and two peoples will be separated from within you. One people will be stronger than the other, and the older will serve the younger."

When the stronger females were in heat, Jacob would set up the branches in the troughs in front of the flock, so they would mate near the branches.

But if the animals were weaker, he did not set the branches there. So the weaker animals ended up belonging to Laban and the stronger animals to Jacob.