Shiva Purana
मध्ये केसरजालास्य स्थाप्य लिंगं कनीयसम् ॥ अंगुष्ठप्रतिमं रम्यं सर्वगन्धमयं शुभम् ॥ १० ॥
Placing the youngest penis in the middle of a network of lotuses It is like a thumb and is beautiful and auspicious with all kinds of fragrances.
english translation
madhye kesarajAlAsya sthApya liMgaM kanIyasam ॥ aMguSThapratimaM ramyaM sarvagandhamayaM zubham ॥ 10 ॥
hk transliteration by Sanscript