Shiva Purana
विष्णोर्नाम्नां कोटिजपाद्ग्रहणेचन्द्रसूर्ययोः ॥ यत्फलं लभ्यते तस्माच्छतकोटिगुणोत्तरम् ॥ २८॥
By chanting the names of Vishnu in crores of times the eclipse of the moon and the sun The fruit obtained is a hundred crore times greater than that obtained.
english translation
viSNornAmnAM koTijapAdgrahaNecandrasUryayoH ॥ yatphalaM labhyate tasmAcchatakoTiguNottaram ॥ 28॥
hk transliteration by Sanscript