The EN World kitten
I'm not sure about earlier editions, but as per page 259 of the 3e Forgotten Realms Campaign Setting (affiliate link) it says this:From memory you could only be raised within 1d10 days if you were faithless/false.
As part of his agreement with the baatezu, Kelemvor allows a few groups of devils to torment the citizens of the city. There is no respite for the False unless Kelemvor wills it, and in his tenure he has not been known to change his mind. Furthermore, once Kelemvor has made his judgment, the soul cannot be raised or resurrected without the intervention of a deity (represented by at least the use of a miracle or wish spell), who will almost certainly have to negotiate with Kelemvor.