===[[Old Testament]] prophecy===
Below the center are a tree, an ox, and an ass. The tree is the "Jesse Tree" from [[prophecy]], which says that a shoot will sprout from the stump of Jesse (the father of [[
King David]]): ''"A shoot shall sprout from the stump (tree) of Jesse and from his roots a bud shall blossom. The spirit of the Lord shall rest upon Him"''([[Book of Isaiah|Isaiah]] 11:1-2). The ox and the ass are also from an Old Testament prophecy:''"The ox knows his owner, and the donkey his master's crib"''(Isaiah 1:3). Sometimes they are shown near the Christ child, providing warmth from their breath.