Shiva Purana
अथ विद्यासनं न्यस्य सुप्रलिप्ते तु मण्डले ॥ विद्याकोशं प्रतिष्ठाप्य यजेत्पुष्पादिभिः क्रमात् ॥ ६३ ॥
Then after conceiving the seat of Vidyā on the well-smeared Maṇḍala he shall install the sheath of Vidyā and worship the same with flowers etc. in due order.
english translation
atha vidyAsanaM nyasya supralipte tu maNDale ॥ vidyAkozaM pratiSThApya yajetpuSpAdibhiH kramAt ॥ 63 ॥
hk transliteration by Sanscript