'Be Strong' in the Bible

Thus, saith Yahweh of hosts, Let your hands be strong, ye who are hearing, in these days, these words, - from the mouth of the prophets who, on the day the house of Yahweh of hosts, was founded, foretold that, the temple, should be built: -

And it shall come to pass that - Just as ye had become a curse among the nations, O house of Judah and house of Israel, So, will I save you, and ye shall become a blessing, - Do not fear, let your hands, be strong.