'Be Strong' in the Bible

And the fourth kingdom shall be strong as iron, because that iron beats small, and makes thin all: and as iron breaks all these, it shall beat small and break.

And the toes of the feet, part of iron, and part of burnt clay, from the end of the kingdom shall be strong, and part shall be cut asunder.

And he will say, Thou shalt not fear, O man of desires: peace to thee; be strong, and be strong. And in his speaking with me I was strengthened, and saying, My lord shall speak; for thou didst strengthen me.

And the king of the south shall be strong, and from his chiefs; and he shall be strong above him, and he ruled from much dominion.

And those condemning the covenant shall pollute by smooth things: and the people knowing their God shall be strong and do.