A Lamb arrives in heaven to take the book from the Enthroned One (Revelation 5). Why a Lamb?
We think of the “Lamb” in association with Passover, but Passover is not the only time when a lamb has to be offered. In fact, Passover doesn’t even requires a lamb but permits either a sheep or a kid. In Leviticus 23, which structures much of Revelation, the list of feasts begins with Sabbath and then moves to Passover and the feast of unleavened bread. In the description of Passover, there is no mention of a Lamb.
There is a lamb in the next section of Leviticus 23, which describes not the Passover but the feast of “first sheaf” (Leviticus 23:9-14), which takes place when the harvest first begins to sprout. The first sheaf that appears is taken before the Lord and offered as a wave offering. It’s the first growth appearing from the ground, the firstfruits of the earth. And when the sheaf was waved before the Lord, a “male lamb one year old without defect for an ascension offering” was also brought to Yahweh (v. 12).