Mahabharata 12.168.18

तृष्णार्तिप्रभवं दुःखं दुःखार्तिप्रभवं सुखम्सुखात्संजायते दुःखमेवमेतत्पुनः पुनःसुखस्यानन्तरं दुःखं दुःखस्यानन्तरं सुखम्

tṛṣṇārtiprabhavaṃ duḥkhaṃ duḥkhārtiprabhavaṃ sukhamsukhātsaṃjāyate duḥkhamevametatpunaḥ punaḥsukhasyānantaraṃ duḥkhaṃ duḥkhasyānantaraṃ sukham

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