Sāṃkhya Kārikā verse 33

antaḥ karaṇaṃ trividhaṃ daśadhā bāhyaṃ trayasya viṣayākhyam |
sāmpratakālaṃ bāhyaṃ trikālam ābhyantaraṃ karaṇam ||

antar - internalkaraṇa - making, effectingtri - threedasa - tendhā - putting, placingbāhya - externaltraya - the threeviṣaya - an object of sense; anything perceptible by the senses; any object of affection or concern or attentionprati - with regard to; towards, in the direction of; back, in return, again; in opposition to, against, countekāla - time, a period of time; season, the proper time or season forābhyantara - internal, being inside, interior, innerkāraṇa - reasons, cause