'Be Strong' in the Bible

Can thine heart endure, or can thine hands be strong, in the days that I shall deal with thee? I the LORD have spoken it, and will do it.

Son of man, I have broken the arm of Pharaoh king of Egypt; and, lo, it hath not been bound up, to apply healing medicines, to put a bandage to bind it, that it be strong to hold the sword.