Anandakanda 1.15.59

1.15.59

candrasūryoparāgādikāleṣvaṣṭasahasrakam /
mantraṃ vinā na siddhiḥ syātkalpakoṭiśatairapi //

At the times of lunar and solar eclipses and the like, [he should recite it] eight thousand times. / Without the mantra there can be no success, even in hundreds of millions of kalpas;