Exodus 13:18-22

So God led them in a roundabout way through the wilderness toward the Red Sea. Thus the Israelites left Egypt like an army ready for battle. Moses took the bones of Joseph with him, for Joseph had made the sons of Israel swear to do this. He said, “God will certainly come to help you. When he does, you must take my bones with you from this place.” The Israelites left Succoth and camped at Etham on the edge of the wilderness. The LORD went ahead of them. He guided them during the day with a pillar of cloud, and he provided light at night with a pillar of fire. This allowed them to travel by day or by night. And the LORD did not remove the pillar of cloud or pillar of fire from its place in front of the people.