Shiva Purana
मूर्ध्नि मूलेन लिंगस्य शिवहस्तं प्रविन्यसेत् ॥ शतमर्धं तदर्धं वा क्रमाद्द्रव्यैश्च सप्तभिः ॥ २७ ॥
Place the hand of Lord Śiva on the root of the lingam on the head. One hundred and fifty or half of that with seven ingredients in order.
english translation
mUrdhni mUlena liMgasya zivahastaM pravinyaset ॥ zatamardhaM tadardhaM vA kramAddravyaizca saptabhiH ॥ 27 ॥
hk transliteration by Sanscript