Shiva Purana
संस्तुतो लिंगरूपेण सुतदर्शनहेतुतः ॥ गतस्तत्र महाप्रीत्या स शिवः स्वगिरेर्मुने ॥ ११॥
O sage, Śiva went there from his mountain, with great pleasure in order to see his son Kārttikeya. It is stationed there in the form of the phallic image.
english translation
saMstuto liMgarUpeNa sutadarzanahetutaH ॥ gatastatra mahAprItyA sa zivaH svagirermune ॥ 11॥
hk transliteration by Sanscript