Shiva Purana
शिवरात्रावहोरात्रं निराहारो जितेंद्रि यः १२ब्। अर्चयेद्वा यथान्यायं यथाबलमवंचकः १२ ।
The devotee shall observe fast on Śivarātrī, both during the day and the night. He shall perfectly restrain his sense-organs. He shall adore (with flowers) to the extent of his strength. He shall not deceive any one.
english translation
zivarAtrAvahorAtraM nirAhAro jiteMdri yaH 12b। arcayedvA yathAnyAyaM yathAbalamavaMcakaH 12 ।
hk transliteration by Sanscript