Shiva Purana
क्वचिदंशे तु यः शक्तस्त्वशक्तः क्वचिदंशके ॥ सो ऽपि शक्त्यनुसारेण कुर्वंश्चेत्फलमृच्छति ॥ ६६ ॥
If a devotee can perform worship in some part he too derives the benefit of that part in accordance with his ability.
english translation
kvacidaMze tu yaH zaktastvazaktaH kvacidaMzake ॥ so 'pi zaktyanusAreNa kurvaMzcetphalamRcchati ॥ 66 ॥
hk transliteration by Sanscript