Shiva Purana
लिंगेप्रसूतिकर्तारं लिंगिनं पुरुषो यजेत् । लिंगार्थगमकं चिह्नं लिंगमित्यभिधीयते १०६ ।
Persons should worship Śiva, the cause of birth, in his phallic form. That which makes the Puruṣa known, is called Liṅga, the symbol.
english translation
liMgeprasUtikartAraM liMginaM puruSo yajet । liMgArthagamakaM cihnaM liMgamityabhidhIyate 106 ।
hk transliteration by Sanscript