Shiva Purana

siva.sh/siva-purana/rudra-samhita/178/33

अस्थिभिश्शंखचूडस्य शंखजातिर्बभूव ह ।। प्रशस्तं शंखतोयं च सर्वेषां शंकरं विना ।। ३३ ।।

sanskrit

All the conches in the world are formed of the bones of Śaṅkhacūḍa. Except for Śiva, the holy water from the conch is sacred for every one.

english translation

asthibhizzaMkhacUDasya zaMkhajAtirbabhUva ha || prazastaM zaMkhatoyaM ca sarveSAM zaMkaraM vinA || 33 ||

hk transliteration by Sanscript