Shiva Purana
बाह्ये वाभ्यंतरे वाथ यत्र स्यान्मनसो रतिः ॥ प्राग्वासनावशाद्देवि तत्त्वनिष्ठां समाचरेत् ॥ ५५ ॥
O gentle lady, stability in the Tattvas shall be practised beginning with an external or internal object where the mind feels interested urged by previous impressions.
english translation
bAhye vAbhyaMtare vAtha yatra syAnmanaso ratiH ॥ prAgvAsanAvazAddevi tattvaniSThAM samAcaret ॥ 55 ॥
hk transliteration by Sanscript