'Work' in the Bible

And I saw another angel coming from the east and carrying a seal belonging to the ever-living God. He called in a loud voice to the four angels whose work it was to injure the earth and the sea.

And his power of leading astray the inhabitants of the earth is due to the marvels which he has been permitted to work in the presence of the Wild Beast. And he told the inhabitants of the earth to erect a statue to the Wild Beast who had received the sword-stroke and yet had recovered.

From His mouth there comes a sharp sword with which He will smite the nations; and He will Himself be their Shepherd, ruling them with a scepter of iron; and it is His work to tread the winepress of the fierce anger of God, the Ruler of all.