Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 9

Sanskrit:

स वै भगवत: श्रीमत्पादस्पर्शहताशुभ: ।भेजे सर्पवपुर्हित्वा रूपं विद्याधरार्चितम् ॥ ९ ॥

ITRANS:

sa vai bhagavataḥ śrīmatpāda-sparśa-hatāśubhaḥbheje sarpa-vapur hitvārūpaṁ vidyādharārcitam

Translation:

The snake had all his sinful reactions destroyed by the touch of the Supreme Lord’s divine foot, and thus he gave up his serpent body and appeared in the form of a worshipable Vidyādhara.

Purport:

The words rūpaṁ vidyādharārcitam indicate that the erstwhile snake appeared in a beautiful form worshipable among the demigods called Vidyādharas. In other words, he appeared as the leader of the Vidyādharas.