Mahabharata 12.212.37
यत्तमोपहतं चित्तमाशु संचारमध्रुवम्करोत्युपरमं काले तदाहुस्तामसं सुखम्
yattamopahataṃ cittamāśu saṃcāramadhruvamkarotyuparamaṃ kāle tadāhustāmasaṃ sukham
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book