Shiva Purana

siva.sh/siva-purana/vishweshwara-samhita/25/87

एवं ज्ञात्वा तु माहात्म्यं रुद्रा क्षस्य महेश्वरि । सम्यग्धार्यास्समंत्राश्च भक्त्याधर्मविवृद्धये ८७ ।

sanskrit

Thus realising its greatness the Rudrākṣa must be worn well, O Maheśvarī, repeating the mantras with devotion to make virtues flourish.

english translation

evaM jJAtvA tu mAhAtmyaM rudrA kSasya mahezvari | samyagdhAryAssamaMtrAzca bhaktyAdharmavivRddhaye 87 |

hk transliteration by Sanscript