Leviticus ties the clean/unclean rules to the LORD’s identity, stating, “For I am the LORD your God… I am holy.” The statement is given as the reason Israel is to be set apart and not defiled by unclean creatures. It closes the chapter’s purpose of distinguishing clean from unclean (Leviticus 11:44–47).
Leviticus 11:41–47 closes the food rules by focusing on “creeping” creatures that move on the ground. Israel is told not to eat them and not to let contact with them make them unclean. The reason is repeated: Yahweh is their God, Yahweh is holy, and he brought them out of Egypt. These verses function as the closing word to the longer set of instructions in Leviticus 11 about animals, birds, sea creatures, and small creatures.
These closing verses restate the chapter’s basic point: Israel is to treat “ground-creeping” creatures as not for food, and to avoid becoming “unclean” through them (verses 41–44). The text ties these rules to relationship and identity: “I am Yahweh your God,” and “I brought you up out of Egypt” (verses 44–45).
A careful answer keeps the immediate passage, the book's argument, and the whole-Bible storyline together, so the question is answered in context instead of as a detached idea.
Start with Leviticus 11:44-47, then read the surrounding section so the answer stays connected to the passage's flow.
44For I am Yahweh your God: sanctify yourselves therefore, and be you holy; for I am holy: neither shall you defile yourselves with any manner of creeping thing that moves on the earth.
45For I am Yahweh who brought you up out of the land of Egypt, to be your God: you shall therefore be holy, for I am holy.
46This is the law of the animal, and of the bird, and of every living creature that moves in the waters, and of every creature that creeps on the earth;
47to make a distinction between the unclean and the clean, and between the living thing that may be eaten and the living thing that may not be eaten.