'Be Strong' in the Bible

In the first year of Cyrus the king, Cyrus the king made a decree concerning the house of God at Jerusalem. Let the house be built, the place where they offered sacrifices, and let the foundations of it be strongly laid. The height of it shall be sixty cubits, and the breadth of it shall be sixty cubits,

And now do not give your daughters to their sons, nor take their daughters to your sons, nor seek their peace or their wealth forever, so that you may be strong and eat the good of the land and leave it for an inheritance to your sons forever.