Shiva Purana
चतुः पञ्चाशदक्षैस्तु हृच्छ्रेष्ठा हि प्रकीर्तिता ॥ इत्येवं मालया कुर्याज्जपं कस्मै न दर्शयेत् ॥ ४१ ॥
The fifty-four Dakṣas have described the heart as the best of all. One should thus chant the mantra with a garland and show it to no one.
english translation
catuH paJcAzadakSaistu hRcchreSThA hi prakIrtitA ॥ ityevaM mAlayA kuryAjjapaM kasmai na darzayet ॥ 41 ॥
hk transliteration by Sanscript