Leviticus, whose name derives from the Levites (the priestly tribe), is the manual of worship and holiness for Israel. The book contains divine instructions for the sacrificial system, purification ceremonies, laws of holiness, and religious festivals. Through detailed rituals and moral codes, Leviticus teaches that a holy God requires a holy people, establishing the means by which Israel can approach Yahweh and maintain a covenant relationship with Him. The book prefigures Christ's redemptive work as the perfect sacrifice.