Shiva Purana
विना भस्मत्रिपुंड्रेण विना रुद्रा क्षमालया । बिल्वपत्रं विना नैव पूजयेच्छंकरं बुधः ५५ ।
Śiva shall not be worshipped without Tripuṇḍra, Rudrākṣa and Bilvapatra. O best of sages! when the worship is on, if the ash is not available, Tripuṇḍra, (three lines on the forehead) shall be drawn with the white clay.
english translation
vinA bhasmatripuMDreNa vinA rudrA kSamAlayA । bilvapatraM vinA naiva pUjayecchaMkaraM budhaH 55 ।
hk transliteration by Sanscript