Low-class people, due to their gross ignorance, introduce a system of religion that deviates from the Vedic principles. Following their own mental concoctions, they automatically fall down into the darkest regions of existence.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
ते च ह्यर्वाक्तनया निजलोकयात्रयान्धपरम्परया- ऽऽश्वस्तास्तमस्यन्धे स्वयमेव प्रपतिष्यन्ति
te ca hyarvāktanayā nijalokayātrayāndhaparamparayā- ''śvastāstamasyandhe svayameva prapatiṣyanti
SB 5.6.11