"Also, the gold and silver articles of the house of God, which Nebuchadnezzar took from the temple in Jerusalem and brought to Babylon, are to be returned to their places in the temple in Jerusalem; they are to be deposited in the house of God." NIV translation
The decree also returned the things that had been taken from the temple by Nebuchadnezzar. Does it seem like the devil has stolen things from your life? Just as we see here, God can and will restore what has been taken from you.
"Now then, Tattenai, governor of Trans-Euphrates, and Shethar-Bozenai and you, their fellow officials of that province, stay away from there. Do not interfere with the work on this temple of God. Let the governor of the Jews and the Jewish elders rebuild this house of God on its site." NIV translation
King Darius gives orders to the men that had requested the investigation and they must have been shocked to be told to leave the Jews alone. All clear! is the signal that is given to the Jews to continue and complete the construction of the temple.
This is a picture of how things are in our Christian walk in that, when God tells you to do something, He will take care of the opposition.
Just as the men were still working on the temple, we need to keep walking the walk that God has laid out for us and trust Him to handle the opposition.
"Moreover, I hereby decree what you are to do for these elders of the Jews in the construction of this house of God: the expenses of these men are to be fully paid out of the royal treasury, from the revenues of Trans-Euphrates, so that the work will not stop. Whatever is needed - young bulls, rams, male lambs for burnt offerings to the God of heaven, and wheat, salt, wine and oil, as requested by the priests in Jerusalem - must be given them daily without fail, so that they may offer sacrifices pleasing to the God of heaven and pray for the well-being of the king and his sons." NIV translation
God not only handled the opposition but He also used the royal treasury to fund the work. We also see that the king provided the animals that were required for the sacrifices at the temple. He did this so that the priests would pray for him and his sons. This is what we commonly call "riding on someone's coattails" and there are many who try to do the same thing today. There are many today who try to buy the prayers and favor of God and there are many so called "pastors", "bishops", etc. who are willing to let them believe it so that they can line their own pockets. No amount of money or possessions can buy a personal relationship with God as it is only possible through Jesus Christ.