Shiva Purana
लिंगं नाभिस्तथा जिह्वा नासाग्रञ्च शिखा क्रमात् । कट्यादिषु त्रिलोकेषु लिंगमाध्यात्मिकं चरम् ४४ ।
The spiritual cum mobile form is represented by the constituents of the body, viz. the penis, navel, tongue, the tip of the nose, hips etc.
english translation
liMgaM nAbhistathA jihvA nAsAgraJca zikhA kramAt । kaTyAdiSu trilokeSu liMgamAdhyAtmikaM caram 44 ।
hk transliteration by Sanscript