The works of Ādi Śaṅkarācārya

Sanatsujātīyam

p. 295

p. 295

तदनुविधायिनस्तदा संचरन्ति घोरम् ॥

In plain words

Those who shape themselves to that then wander on into what is dreadful.

Close to the Sanskrit

Those who conform themselves to that, then, move about terribly.