“More than that, my son, be careful: Making many books has no end, and much prattle is exertion of the flesh” (Ecclesiastes 12:12). “More than that [mehema], my son, be careful” – [of] confusion [mehuma], as anyone who introduces more than [these] twenty-four books into his house introduces confusion into his house, such as the book of ben Sira and the book of ben Tigla.56Ancient works of wisdom literature. “And much prattle is exertion of the flesh” – as they were given for prattle and were not given for exertion.57This is in contradistinction to the twenty-four books of the Bible, whose study requires exertion.