The "Rebound" ability found on some cards has this reminder text:
If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from Exile without paying its mana cost.
This means that, if I cast, for example, Blessed Reincarnation, and I decide to use his Rebound ability, the card will be replayed from exile.
The question is then the following: from the text of the cards, with regard to the Rebound ability, it is not clear whether, once the card is used for the second time - thanks to the rebound ability - the card in question ends up in the graveyard, or returns to Exile, this time definitively.
So for example, once Blessed Reincarnation's Rebound ability is used, -
1) this card will go into permanent exile; or,
2) this card will go to its owner's graveyard.