Adhyaya 71: पुरत्रयवृत्तान्तः—ब्रह्मवरदानम्, मयकृतत्रिपुर-निर्माणम्, विष्णुमाया-धर्मविघ्नः, शिवस्तुति, त्रिपुरदाहोपक्रमः
तप उग्रं समास्थाय नियमे परमे स्थिताः तपसा कर्शयामासुर् देहान् स्वान्दानवोत्तमाः
tapa ugraṃ samāsthāya niyame parame sthitāḥ tapasā karśayāmāsur dehān svāndānavottamāḥ
وقد اعتنقوا تقشّفاً شديداً، وثبتوا على أسمى الانضباط (نيياما)، فقام أولئك الدانافا الأخيار بتعذيب أجسادهم وإذهاب لحمها بقوة التَّبَس.
Suta Goswami
It highlights tapas and niyama as concentrated inner disciplines that generate spiritual potency—yet in Shaiva understanding, such power becomes auspicious only when directed to Pati (Shiva) through right devotion, often expressed through Linga-upāsanā.
Implicitly, it contrasts created power (tapas-born force) with the Supreme Lord as Pati: beings may strain the body and gain potency, but liberation and true auspiciousness arise from alignment with Shiva-tattva rather than mere self-mortification.
Ugra-tapas supported by strict niyama—an ascetic regimen akin to preliminary yogic discipline; it suggests the power of restraint and heat (tapas) that, when Shaiva-directed, becomes a limb of Pashupata-oriented practice.