Shiva Purana
यावत्कालं हि जीवस्य शरीरस्थो भवेत्स वै । तावत्कालं स्वल्पमृत्युर्न तं देवि विबाधते ५९ ।
O Goddess, as long as the Rudrākṣa is on the person of a living soul he is least affected by premature death.
english translation
yAvatkAlaM hi jIvasya zarIrastho bhavetsa vai । tAvatkAlaM svalpamRtyurna taM devi vibAdhate 59 ।
hk transliteration by Sanscript