Book of Liang
Non-Korean texts also provide information on Old Korean. A passage of the "Book of Liang", a seventh-century Chinese history, transcribes seven Silla words: a term for "fortification", two terms for "village", and four clothing-related terms. Three of the clothing words have Middle Korean cognates, but the other four words remain "uninterpretable". The eighth-century Japanese history "Nihon Shoki" also preserves a single sentence in the Silla language, apparently some sort of oath, although its meaning can only be guessed from context.