Of the duties laid down for the various modes of life including the fourth mode, these which I have described, which have Yoga for their foremost, and which indicate a complete stoppage of all operations of the Mind and the Understanding, have been laid down by Shandilya.
पृथग्भूतेषु सृष्टेषु चतुर्थाश्रमकर्मसु। समाधौ योगमेवैतच्छाण्डिल्यः शममब्रवीत्॥