SB 5.6.11
te ca hy arvaktanaya nija-loka-yatrayandha-paramparayasvastas tamasy andhe svayam eva prapatisyanti.
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
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.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
In this connection, one may see Bhagavad-gita, Chapter Sixteen, where there is a description of the downfall of the asuras (16.16 and 16.23).