Textus Receptus explains what Alpha and Omega means ie the A to Z of the letters. The OT Hebrew has a similar saying Aleph Tav (eth, H.853) meaning the same thing and it is found in the middle of the very first verse of Genesis.
Gen 1: 1 In the beginning God created (eth = A to Z, a word untranslated, H.853) the heaven and the earth.
Elohim are very busy in Genesis 1:1 JB