Srimad-Bhagavatam: Canto 4 - Chapter 1 - Verse 16
ब्रह्मा ब्रह्ममयं वर्म भारती हारमुत्तमम् ।हरि: सुदर्शनं चक्रं तत्पत्न्यव्याहतां श्रियम् ॥ १६ ॥
brahmā brahmamayaṁ varmabhāratī hāram uttamamhariḥ sudarśanaṁ cakraṁtat-patny avyāhatāṁ śriyam
Lord Brahmā presented King Pṛthu with a protective garment made of spiritual knowledge. Bhāratī [Sarasvatī], the wife of Brahmā, gave him a transcendental necklace. Lord Viṣṇu presented him with a Sudarśana disc, and Lord Viṣṇu’s wife, the goddess of fortune, gave him imperishable opulences.
All the demigods presented various gifts to King Pṛthu. Hari, an incarnation of the Supreme Personality of Godhead known as Upendra in the heavenly planet, presented the King with a Sudarśana disc. It should be understood that this Sudarśana disc is not exactly the same type of Sudarśana disc used by the Personality of Godhead, Kṛṣṇa, or Viṣṇu. Since Mahārāja Pṛthu was a partial representation of the Supreme Personality of Godhead’s power, the Sudarśana disc given to him represented the partial power of the original Sudarśana disc.