'Strength' in the Bible

When thou tillest the ground, it shall not henceforth yield unto thee her strength; a fugitive and a vagabond shalt thou be in the earth.

Reuben, thou art my firstborn, my might, and the beginning of my strength, the excellency of dignity, and the excellency of power:

But his bow abode in strength, and the arms of his hands were made strong by the hands of the mighty God of Jacob; (from thence is the shepherd, the stone of Israel:)