Shiva Purana
दृष्टो ऽसौ वासुदेवेन कृष्णेनाक्लिष्टकर्मणा ॥ धौम्याग्रजस्ततस्तेन कृत्वा पाशुपतं व्रतम् ॥ १० ॥
Lord Vāsudeva, Lord Kṛṣṇa, whose activities are effortless, saw this demon. Then the elder brother of Dhaumya observed the vow of Pashupata.
english translation
dRSTo 'sau vAsudevena kRSNenAkliSTakarmaNA ॥ dhaumyAgrajastatastena kRtvA pAzupataM vratam ॥ 10 ॥
hk transliteration by Sanscript