Paradox of becoming by Thanissaro Bhikkhu
or Footnote 99 of the translation of DN22 by the Burma Piṭaka Associationpage 30 wrote:Like bhava, “non-becoming”—vibhava—is a term that the Buddha does not
define. It is related to the verb vibhavati, which means to stop becoming, to stop being, to go out of existence. Iti 49 gives an example of how delight in non-becoming would be expressed:
“When this self, at the break-up of the body, after death, perishes & is
destroyed, and does not exist after death, that is peaceful, that is exquisite,
that is sufficiency!”
Thus craving for non-becoming would mean a desire for something already
existing to perish or be destroyed.
best wishes, acinteyyo