Shiva Purana

siva.sh/siva-purana/saturda-samhita/1/10

सुनन्दो नन्दनश्चैव विश्वनन्दोपनन्दनौ ।। शिष्यास्तस्य महात्मानो यैस्तद्ब्रह्म समावृतम्।।१०।।

sanskrit

They were Sunanda, Nandana, Viśvananda and Upanandana. They were the disciples of that noble soul. By them the Brahman was encircled.

english translation

sunando nandanazcaiva vizvanandopanandanau || ziSyAstasya mahAtmAno yaistadbrahma samAvRtam||10||

hk transliteration by Sanscript