Shiva Purana
भूमौ लिंगं यदा त्वं च स्थापयिष्यसि तत्र वै ॥ स्थास्यत्यत्र न संदेहो यथेच्छसि तथा कुरु॥ १५॥
Wherever this phallic image is placed on the ground il will become stationary. There is no doubt about it. Do as you please.
english translation
bhUmau liMgaM yadA tvaM ca sthApayiSyasi tatra vai ॥ sthAsyatyatra na saMdeho yathecchasi tathA kuru॥ 15॥
hk transliteration by Sanscript