Soma
In the Rigveda Soma is a mountain plant, the tawny juice pressed from it and the god who is both; the whole ninth book (114 hymns) and six other hymns are his, third after Indra and Agni. He is the drink of the gods and of Indra before battle, a poet and guide, lord of plants, brought from the highest heaven by a falcon. A few late hymns (10.85) place him among the constellations; in the Brahmanas King Soma is the moon, the food of the gods, and in the epics and Puranas Soma is a name of Chandra, the moon god, husband of the twenty-seven star sisters and father of Budha. The KB entity chandra is the same god under his later name.
Sources: Hymns of the Rigveda, tr. R. T. H. Griffith (1896), hymns read for the Vedic layer; Vedic Mythology, A. A. Macdonell (1897); The Satapatha-Brahmana, tr. Julius Eggeling (Sacred Books of the East 12, 41); The Vishnu Purana, tr. H. H. Wilson (1840) · see Soma's web