The fourth stage is the service performed after the resurrection of the dead. The desire to receive, which will be completely eliminated through death and burial, is resurrected with the worst kind of exaggerated desire to receive. That is the secret of “the dead are destined to be resurrected with their blemishes” (above, chapter 28). People then transform it [the body] through receiving in the form of giving, as discussed at length. There are rare individuals who perform this service even while living in this world.
The Fourth Stage Beyond the Resurrection of the Dead
Baal HaSulam's Introduction to Zohar 32:2