'Unclean' in the Bible

And Daniel had come to the decision that he would not make himself unclean with the king's food or wine; so he made a request to the captain of the unsexed servants that he might not make himself unclean.

Then there came to my ears the voice of a holy one talking; and another holy one said to that certain one who was talking, How long will the vision be while the regular burned offering is taken away, and the unclean thing causing fear is put up, and the holy place crushed under foot?

And a strong order will be sent out against the great number for one week; and so for half of the week the offering and the meal offering will come to an end; and in its place will be an unclean thing causing fear; till the destruction which has been fixed is let loose on him who has made waste.

And armies sent by him will take up their position and they will make unclean the holy place, even the strong place, and take away the regular burned offering and put in its place an unclean thing causing fear.

And from the time when the regular burned offering is taken away, and an unclean thing causing fear is put up, there will be a thousand, two hundred and ninety days.