Proper noun
Jasher
An unknown book mentioned twice in the Hebrew Bible.
The " Book of Jasher ", published by Talmudic rabbis in the 17th century, provides some new names for Japheth's grandchildren not found in the Bible, and provided a much more detailed genealogy (see Japhetic ). Source: Internet
Apocryphal writings are a class of documents rejected by some as being worthy to properly be called Scripture, though, as with other writings, they may sometimes be referenced for support, such as the Book of Jasher. Source: Internet