Adhyāya 14 • Shloka 18

ऊर्ध्वं गच्छन्ति सत्त्वस्था मध्ये तिष्ठन्ति राजसाः | जघन्यगुणवृत्तिस्था अधो गच्छन्ति तामसाः || १८ ||

ūrdhvaṁ gacchanti sattva-sthā madhye tiṣṭhanti rājasāḥ | jaghanya-guṇa-vṛtti-sthā adho gacchanti tāmasāḥ || 18 ||

"Those situated in the mode of goodness gradually go upward to the higher planets; those in the mode of passion live on the earthly planets; and those in the abominable mode of ignorance go down to the hellish worlds."