तपश्चकार सुमहत्तस्मिंस्तीर्थवरे तदा । कुशस्तम्बेन कृतवांस्तत्सरो विपुलं विभुः
tapaścakāra sumahattasmiṃstīrthavare tadā | kuśastambena kṛtavāṃstatsaro vipulaṃ vibhuḥ
Dann vollzog er an jenem erhabenen Tīrtha äußerst große Askesen; und der Mächtige erschuf dort mittels eines Büschels Kuśa-Gras einen weiten See.
Sūta (Lomaharṣaṇa) to the sages (deduced)
Tirtha: Viśvāmitreśvara-saras / associated tīrtha (implied)
Type: kund
Scene: At an excellent tīrtha, the powerful sage performs intense austerities; with a clump of kuśa grass he causes a broad lake to appear, waters spreading across the earth as devas marvel.
Tapas sanctifies geography; through austerity and ritual means, sacred spaces (like lakes and shrines) arise for the welfare of future pilgrims.
The tīrtha of Adhyāya 44 where a large saras (lake) is formed and later associated with Viśvāmitreśvara worship.
Tapas (austerity) is highlighted; the use of kuśa (ritually pure grass) indicates sanctified ritual action in creating/marking the tīrtha.