Shiva Purana
माषैः प्रियंगुभिर्मुद्गैस्सप्तधान्यैस्तथाथवा ॥ शंखीपुष्पैर्बिल्वपत्रैः पूजयेत्परमेश्वरम् ॥ ७० ॥
The devotee shall worship lord Śiva with black gram, green gram, Priyaṅgu grains or any of the seven cereals, the flowers of Śaṅkhī and the leaves of Bilva.
english translation
mASaiH priyaMgubhirmudgaissaptadhAnyaistathAthavA ॥ zaMkhIpuSpairbilvapatraiH pUjayetparamezvaram ॥ 70 ॥
hk transliteration by Sanscript