Shiva Purana

siva.sh/siva-purana/uma-samhita/51/29

शिवनाम्नो जपादेव तस्मात्कोटि गुणोत्तरम् ।। श्रीदेवीनामजापात्तु ततः कोटिगुणोत्तरम् ।। २९।।

sanskrit

By chanting the name of Lord Shiva it is a million times better than that. By chanting the names of Śrīdevī, one is more than a million times better than that.

english translation

zivanAmno japAdeva tasmAtkoTi guNottaram || zrIdevInAmajApAttu tataH koTiguNottaram || 29||

hk transliteration by Sanscript