God of Cattle and Horses(牛馬神)
Umasin is a deity that resides in a stable or cowshed and oversees cattle and horses.
Alternate names for this deity include Mabusin (Groom God) and Oeyanggansin (Stable Deity). Umasin protects cattle and horses against diseases to help them proliferate. In the past, cattle were considered very precious, and were treated with special care on the first horse and cow days in the first lunar month. The following is the entry in Dongguksesigi (A Record of the Seasonal Customs of the Eastern Kingdom) for the days associated with the horse on the traditional zodiac in the tenth lunar month: “On the day of the horse, layered rice cake with red bean filling (sirutteok) was set up as an offering in the stable to pray and give thanks for the health of the horses. On the day of Byeongo, the day of the horse on the third stem, the horses were allowed to rest because the syllable “byeong” sounded the same as the word meaning disease. And on the day of Muo, the day of the horse on the fifth stem, the horses were cared for with devotion.” This shows that rituals were held at the stables on the horse days of the tenth lunar month with an offering of red bean rice cake. Today, no special dates are set aside for cattle rituals, which are held on seasonal holidays and when a cow or horse is ill, without sacrificial foods except for morsels from the ritual table on seasonal holidays.
There are no sacred entities associated with Umasin, but in Gyeonggi Province, a small square of white paper or mulberry paper is hung on a nail on the wall and worshipped as Umageollip (Cattle Collector God) throughout the year, until the annual household gods ritual (gosa) when the piece of paper is taken down and burned to be replaced with a new one. In Gangwon Province, instead of a piece of paper, a stone with a hole in the middle is hung with straw rope.