The book of Revelation introduces God as the beginning and ending point of all things.
8 I am the Alpha and the Omega, says the Lord God, who is and who was and who is to come, the Almighty.
New Revised Standard Version Bible: Anglicized Edition, copyright © 1989, 1995 National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved worldwide. http://nrsvbibles.org