'Be Strong' in the Bible

And Ahithophel said unto Absalom, "Get thee in unto thy father's concubines which he hath left to keep the house. For when all Israel shall hear that thou hast made thy father to stink, then shall the hands of all that are with thee be strong."

For," said Hushai, "thou knowest thy father and the men that are with him, how that they be strong men. And they be chafed in their minds, even as a bear robbed of her whelps. And thy father is a man practiced in war, and will not lie a nights among the common people.