Mahabharata 12.323.20
तप्त्वा वर्षसहस्राणि चत्वारि तप उत्तमम्एकपादस्थिताः सम्यक्काष्ठभूताः समाहिताः
taptvā varṣasahasrāṇi catvāri tapa uttamamekapādasthitāḥ samyakkāṣṭhabhūtāḥ samāhitāḥ
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book