Shiva Purana
महेश्वरश्च रेखाया द्वितीयायाश्च देवता । विज्ञेया मुनिशार्दूल शिवदीक्षापरायणैः ९२ ।
Maheśvara is the deity of the second line. O foremost among sages, this must be carefully understood by those who are initiated in the cult of Śiva.
english translation
mahezvarazca rekhAyA dvitIyAyAzca devatA । vijJeyA munizArdUla zivadIkSAparAyaNaiH 92 ।
hk transliteration by Sanscript