Adieu; God keep thee from being an object of pity to anyone.
Don Quixote rose betimes, and bade adieu to his hosts by knocking at the partition of the other room.
Tosilos begged him to explain what had happened him, but Sancho replied that it would not be good manners to leave his master waiting for him; and that some other day if they met there would be time enough for that; and then getting up, after shaking his doublet and brushing the crumbs out of his beard, he drove Dapple on before him, and bidding adieu to Tosilos left him and rejoined his master, who was waiting for him under the shade of a tree.
There are no more uses of "adieu" in the book.
Show samples from other sources
Only adieu, mon plaisir, may we meet again.
Fyodor Dostoyevsky -- Crime and Punishment
You can perhaps think it is a little thing, Stingo, but it is to permit someone to die without a farewell, an adieu, a single word of comfort or understanding that is so terrible to bear.