Sāṃkhya Kārikā verse 30

yugapat-catuṣṭayasya tu vṛttiḥ kramaśaś-ca tasya nirdiṣṭā |
dṛṣṭe tathā-api-adṛṣṭe trayasya tat-pūrvikā vṛttiḥ ||

yugapad - together, at the same time, simultaneouslycatuṣṭaya - a set of 4, quaterniontu - moreover; butvṛtti - fluctuation; modification; turning; set in motion, course of action, behaviour, movement; activity, function; profession, mode of life or conduct, course of action, behaviourkrama - a step; progressing step by step, a particular manner or method of reading and writing Vedic texts; sequence; order; series; regular arrangement; succession; in regular course; gradually, by degreesca - andtasya - its, of it, of thisnirdiṣṭa - pointed out, shown, indicated, declared, announced, foretold, enjoined; ordered, meant or determined for, appointed todṛṣṭa - seen, looked at, beheld, perceived, viewed, observed, noticed; visible, apparent, observable; considered, regarded; treated of; appearing, manifested; occurring, found; experienced, suffered, endured; seen in the mind, devised, imagined, learned,tathā - so, like, after that manner.api - even, also, although; very; something more; moreoveradṛṣta - unseentraya - the three, triple, threefold, consisting of 3, of 3 kindstat - that, thispūrva - eastward, to the east of; in front, before; former, prior, preceding, previous to, earlier than