18 So Jacob rose early in the morning, and took the stone that he had put under his head and set it up as a pillar and poured oil on its top. 19 He called the name of that place 1Bethel; however, previously the name of the city had been Luz. 20 Then Jacob made a vow, saying, “If God will be with me and will keep me on this journey that I take, and will give me food to eat and garments to wear, 21 and I return to my father’s house in safety, then the LORD will be my God. 22 “This stone, which I have set up as a pillar, will be God’s house, and of all that You give me I will surely give a tenth to You.”
When Jacob had lain down the night before, the nearby city had been called Luz. After his encounter with God, Jacob renames it Bethel (the house of God). The stone which had been his pillow now becomes a pillar of remembrance. To remember his dream, and the promise of God, and the vow which he made afterwards. It’s amazing how your perspective can change after being in the presence of God. Never doubt what He can use for his glory.