Mahabharata 13.29.8

ततस्त्रिंशद्गुणे काले लभते वैश्यतामपिवैश्यतायां चिरं कालं तत्रैव परिवर्तते

tatastriṃśadguṇe kāle labhate vaiśyatāmapivaiśyatāyāṃ ciraṃ kālaṃ tatraiva parivartate

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