Bhagavad Gita, Chapter 14, Verse 18

ऊर्ध्वं गच्छन्ति सत्त्वस्था मध्ये तिष्ठन्ति राजसाः । जघन्यगुणवृत्तिस्था अधो गच्छन्ति तामसाः

ūrdhvaṃ gacchanti sattvasthā madhye tiṣṭhanti rājasāḥ | jaghanyaguṇavṛttisthā adho gacchanti tāmasāḥ

Translation

Those who follow Sattva go upwards; the Rājasic remain in the middle; and the Tāmasic, who follow in the course of the lowest guṇa, go downwards.

— Alladi Mahadeva Sastri

Word meanings

ūrdhvam
upwards
gacchanti
go
sattvasthāḥ
in harmony, seated
madhye
in the midst
tiṣṭhanti
stand
rājasāḥ
the active
jaghanyaguṇavṛttisthāḥ
(of the) lowest, of the guṇa, in the mode, seated
adhaḥ
downwards
gacchanti
go
tāmasāḥ
the inert

Śaṅkarācārya's commentary

Those who follow the course of Sattva-guṇa will be born in the region of the Devas or the like. The Rājasic will dwell among men. The Tāmasic — those who follow the course of Tamas, the lowest guṇa — will go down, i.e., they will be born in the wombs of cattle and the like creatures.