What are the collections of sayings of or anecdotes about Muhammad called?

The collections of sayings and anecdotes about Muhammad are called "Hadith." These texts document his Words, actions, and approvals, serving as a crucial source of guidance for Muslims alongside the Quran. Hadiths are categorized into various collections, with notable ones including Sahih Bukhari and Sahih Muslim. They play a significant role in Islamic jurisprudence and theology.