'Strengthen' in the Bible

Lift up an ensign Zionward, Strengthen yourselves, stand not still, For evil I am bringing in from the north, And a great destruction.

Strengthen yourselves, sons of Benjamin, From the midst of Jerusalem, And in Tekoa blow ye a trumpet, And over Beth-Haccerem lift ye up a flame, For evil hath been seen from the north, And great destruction.

Unto the walls of Babylon lift up an ensign, Strengthen the watch, Establish the watchers, prepare the ambush, For Jehovah hath both devised and done that which He spake, Concerning the inhabitants of Babylon.