'Be Strong' in the Bible

"Thus says Yahweh of hosts: 'Let your hands be strong, you who are hearing in these days these words from the mouth of the prophets who [were present] on [the] day {the foundation was laid for the rebuilding of the temple, the house of Yahweh of hosts}.

{And then}, just as you were a curse among the nations, O house of Judah and house of Israel, so will I save you, and you will be a blessing. You must not be afraid; let your hands be strong!'"