Shiva Purana

siva.sh/siva-purana/rudra-samhita/111/27

सगुणस्य महेशस्य लीलया रूप धारिणः ।। गोत्रं कुलं विजानीहि नादमेव हि केवलम् ।।२७।।

sanskrit

Know that the divine sound alone is the gotra, and family of Śiva in His divine form, who assumes forms in His divine sport.

english translation

saguNasya mahezasya lIlayA rUpa dhAriNaH || gotraM kulaM vijAnIhi nAdameva hi kevalam ||27||

hk transliteration by Sanscript