'Stronger' in the Bible

The Lord said to her,“Two nations are in your womb;And two peoples will be separated from your body;And one people shall be stronger than the other;And the older shall serve the younger.”

Moreover, whenever the stronger of the flock were mating, Jacob would place the rods in the sight of the flock in the gutters, so that they might mate by the rods;

but when the flock was feeble, he did not put them in; so the feebler were Laban’s and the stronger Jacob’s.