Shiva Purana
अनेन लिंगतां तस्य भवेन्नान्येन केनचित् ॥ लिंगं च शिवयोर्देहस्ताभ्यां यस्मादधिष्ठितम् ॥ १२ ॥
This is the only way to become a sexually active person. The Lingam is also the body of Lord Śiva and the two Lords from whom it is situated.
english translation
anena liMgatAM tasya bhavennAnyena kenacit ॥ liMgaM ca zivayordehastAbhyAM yasmAdadhiSThitam ॥ 12 ॥
hk transliteration by Sanscript