The document provides an overview of chapters 15-20 of the book of Numbers. It summarizes the key events and teachings within these chapters. In chapter 15, God reminds the Israelites about the proper sacrifices and offerings. A man is stoned for gathering wood on the Sabbath. In chapter 16, Korah leads a rebellion against Moses and Aaron and the earth swallows up Korah and his followers. Chapter 17 describes Aaron's rod budding to confirm him as high priest. Chapter 18 outlines the duties and privileges of the priests. Chapter 19 details the ceremony of the red heifer. Chapter 20 describes the death of Miriam, the people complaining about lack of water, and Moses striking the rock instead of speaking to it