Geremia 51:60

So Jeremiah wrote in a book all the evil that should come upon Babylon, even all these words that are written against Babylon. Wrote in a book - Whether this book contained any more than is recorded in this place we do not know; probably it contained no more than what is found in Geremia 51:62. A book, ספר sepher, signifies, in Hebrew, any writing, great or small.