Sāṃkhya Kārikā verse 33
antaḥ karaṇaṃ trividhaṃ daśadhā bāhyaṃ trayasya viṣayākhyam | sāmpratakālaṃ bāhyaṃ trikālam ābhyantaraṃ karaṇam ||
antar - internalkaraṇa - making, effectingtrividha - three folddaśadhā - tenfold, in ten partsbāhya - externaltraya - the threeviṣaya - an object of sense; anything perceptible by the senses; any object of affection or concern or attentionsāmpratakāla - the present timetrikālam - the 3 times; relating to themābhyantara - internal, being inside, interior, innerkāraṇa - reasons, cause