Wait, but sometimes lesser-known texts are referenced in sectarian or esoteric traditions. I should make it clear that Kitab Yashar is not widely circulated in mainstream Islamic scholarship and is often associated with specific groups or as a metaphor. However, there are claims by some groups in the 20th century (like in Lebanon or Palestine) that this book will appear in the end times as mentioned in hadiths. For example, a hadith states that the Book of Yusha (Yashar), the Book of Ezra, and the Zabur will appear in the latter times and be accepted by non-Muslims. These groups sometimes claim to have discovered such a book.