Shiva Purana

siva.sh/siva-purana/rudra-samhita/143/62

नारदोपि तथारूपो यथा मायी तथैव सः ।। तथापि विकृतो नाभूत्परमेशादनुग्रहात् ।।६२।।

sanskrit

Though Nārada and the heretic sage had been in that guise for long, they were not defiled, thanks to the benediction of lord Śiva.

english translation

nAradopi tathArUpo yathA mAyI tathaiva saH || tathApi vikRto nAbhUtparamezAdanugrahAt ||62||

hk transliteration by Sanscript