When I saw him, I fell at his feet as though dead. But he laid his right hand on me, saying, "Fear not, I am the first and the last, and the living one. I died, and behold I am alive forevermore, and I have the keys of Death and Hades."
#revelation 1:17-18

This can only be Yeshua describing himself as "the first and the last", which means exactly the same thing as "the alpha and the omega". It is also a clear statement of his divinity. Verse 8: "I am the Alpha and the Omega," says the Lord God, "who is and who was and who is to come, the Almighty."

#yeshua (aka #jesus) is the Almighty.