'Once' in the Bible

They answered once more and said, "Let the king tell the dream to his servants and we will make the explanation known."

Then the iron, the clay, the bronze, the silver and the gold {all at once} broke into pieces and they became like chaff from the summer threshing floor, and the wind carried them away and any trace of them could not be found. But the stone that struck the statue became a great mountain and it filled the whole earth.

Now if you are ready, when you hear the sound of the horn, pipe, lyre, trigon, harp, dulcimer, and all kinds of music, to fall down and worship the image which I have made, very good. But if you do not worship, you shall be thrown at once into the midst of a furnace of blazing fire; and what god is there who can rescue you out of my hands?”

Once the satraps, prefects, governors, and ministers of the king had gathered around, they saw that those men were physically unharmed by the fire. The hair of their heads was not singed, nor were their trousers damaged. Not even the smell of fire was to be found on them!

He said, “Do you know why I’ve come to you? I must return at once to fight against the prince of Persia, and when I leave, the prince of Greece will come.