Bhagavad-gītā As It Is · Text 3.32
Dedicate action to Krishna
ये त्वेतदभ्यसूयन्तो नानुतिष्ठन्ति मे मतम् ।
सर्वज्ञानविमूढांस्तान्विद्धि नष्टानचेतसः ॥ ३२ ॥
ye tv etad abhyasūyanto
nānutiṣṭhanti me matam
sarva-jñāna-vimūḍhāṁs tān
viddhi naṣṭān acetasaḥ
But those who, out of envy, disregard these teachings and do not follow them regularly are to be considered bereft of all knowledge, befooled, and ruined in their endeavors for perfection.
Read Śrīla Prabhupāda's purport on Vedabase.io