A type of Anaśana (fasting);
fasting undertaken in due order of the practice of spiritual discipline- following the proper sequence right from accepting initiation, adopt training up to non-cessation of the Gaṇa (2) (monastic sub-order), to undertake the Anaśana in the last time of life.
ekkekkaṃ duhā paḍivajjai- ahāṇupuvvīe aṇāṇupuvvīe ya. pavvajjāsikkhāpayādikameṇa maraṇakālaṃ pattassa āṇupuvvī, atthaggahanāīe pade apphāsettā aṇāṇupuvvī.
(NiCū 3 p. 293)