Shiva Purana
तत्पत्रं तत्र निक्षिप्य पश्चिमाभिमुखः स्थितः ॥ तत्पूर्वभागे सुदृढं सूत्रमादाय रंजितम् ॥ ४ ॥
Placing the leaf there he stood facing west Take a strong thread and paint it on the front part.
english translation
tatpatraM tatra nikSipya pazcimAbhimukhaH sthitaH ॥ tatpUrvabhAge sudRDhaM sUtramAdAya raMjitam ॥ 4 ॥
hk transliteration by Sanscript