This name for the scriptures is a clear example of Christian slang. One cannot assume that every non-Christian will understand this term. Most non-Christians may find this word to be too "churchy".
Depending on the audience, other words may be helpful. Here are some examples:
Scripture The Holy Scriptures The Hebrew and Christian scriptures The Bible The Tanakh (Old Testament) and the B'rit Chadashah (New Testament)- Holy writings/ Sacred writings