Mahabharata 12.235.21

परस्परं तथैवाहुश्चातुराश्रम्यमेव तत्ये चोक्ता नियमास्तेषां सर्वं कार्यं बुभूषता

parasparaṃ tathaivāhuścāturāśramyameva tatye coktā niyamāsteṣāṃ sarvaṃ kāryaṃ bubhūṣatā

Our plain-language meaning of this verse is waiting for scholar review.