A variety of Anuprekṣā (4) (contemplative meditation) of Śukladhyāna (pure meditation);
to contemplate over the endlessness of the sequence of transmigrations.
anantā atyantaṃ prabhūtā vṛttiḥ - varttanaṃ yasyāsāvanantavṛttiḥ... bhavasantānasyeti gamyate, tasyā annprekṣā anantavṛttitānuprekṣā.
(Sthā 4.72 Vṛ Pa 181)