'Be Strong' in the Bible

Thus says LORD of hosts: Let your hands be strong, ye who hear in these days these words from the mouth of the prophets who were in the day that the foundation of the house of LORD of hosts was laid, even the temple, that it might

And it shall come to pass that, as ye were a curse among the nations, O house of Judah and house of Israel, so I will save you, and ye shall be a blessing. Fear not. Let your hands be strong.