Shiva Purana
यावल्लिंगं स्थिरं नैव जगतां त्रितये शुभम् ॥ जायते न तदा क्वापि सत्यमेतद्वदाम्यहम् ॥ २८ ॥
As long as the penis does not become stationary there cannot be anything good in the three worlds. I am telling you the truth.
english translation
yAvalliMgaM sthiraM naiva jagatAM tritaye zubham ॥ jAyate na tadA kvApi satyametadvadAmyaham ॥ 28 ॥
hk transliteration by Sanscript