Shiva Purana
प्रसदादेव सा भक्तिः प्रसादो भक्तिसंभवः ॥ अवस्थाभेदमुत्प्रेक्ष्य विद्वांस्तत्र न मुह्यति ॥ २७ ॥
Their devotion is due to their grace and the grace is a result of devotion in view of the difference in states. A learned man is not deluded therein.
english translation
prasadAdeva sA bhaktiH prasAdo bhaktisaMbhavaH ॥ avasthAbhedamutprekSya vidvAMstatra na muhyati ॥ 27 ॥
hk transliteration by Sanscript