Bhagavad-gītā 14.18
BG 14.18
Open the full passageऊर्ध्वं गच्छन्ति सत्त्वस्था मध्ये तिष्ठन्ति राजसाः । जघन्यगुणवृत्तिस्था अधो गच्छन्ति तामसाः ॥१८॥
Sanskrit
ūrdhvaṁ gacchanti sattva-sthā madhye tiṣṭhanti rājasāḥ jaghanya-guṇa-vṛtti-sthā adho gacchanti tāmasāḥ
Translation
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.