Srimad-Bhagavatam: Canto 3 - Chapter 1 - Verse 44

Sanskrit:

सिद्धान् विद्याधरांश्चैव तिरोधानेन सोऽसृजत् ।तेभ्योऽददात्तमात्मानमन्तर्धानाख्यमद्भुतम् ॥ ४४ ॥

ITRANS:

siddhān vidyādharāṁś caivatirodhānena so ’sṛjattebhyo ’dadāt tam ātmānamantardhānākhyam adbhutam

Translation:

Then Lord Brahmā, by his ability to be hidden from vision, created the Siddhas and Vidyādharas and gave them that wonderful form of his known as the Antardhāna.

Purport:

Antardhāna means that these living creatures can be perceived to be present, but they cannot be seen by vision.