What Jesus said
"I am Alpha and Omega, the First and the Last, the Beginning and the End."
Apocalypse (Revelation) 22:13
Alpha and Omega are the first and last letters of the Greek alphabet. It's a title that belongs to God alone. Here is God saying it in Isaiah:
"Thus saith the Lord the king of Israel, and his redeemer the Lord of hosts: I am the first, and I am the last, and besides me there is no God."
Isaias 44:6
Jesus takes God's own title and says it of himself.
The same two letters, in Hebrew
Revelation was written in Greek, so Jesus says Alpha and Omega. But the Old Testament was written in Hebrew. And in Hebrew, the first and last letters of the alphabet are Aleph (א) and Tav (ת).
Put them together and you get a real Hebrew word: את, pronounced "et."
The word nobody translates
את has no meaning of its own. It's a little grammar marker that points to the object of a sentence. English has nothing like it, so every English Bible leaves it out.
It appears thousands of times in the Old Testament. The first time is in the very first sentence:
In Hebrew, Genesis 1:1 reads: In the beginning God created את the heavens and את the earth.
The First and the Last, sitting silently in the act of creation. And John tells us who was there:
"In the beginning was the Word: and the Word was with God: and the Word was God. The same was in the beginning with God. All things were made by him: and without him was made nothing that was made."
John 1:1 to 3
Before "whom they have pierced"
Now look at one of the most famous prophecies of the crucifixion:
"And I will pour out upon the house of David, and upon the inhabitants of Jerusalem, the spirit of grace, and of prayers: and they shall look upon me, whom they have pierced: and they shall mourn for him as one mourneth for an only son."
Zacharias (Zechariah) 12:10
In the Hebrew, את sits right there, between "me" and "whom they have pierced." They shall look upon me, Aleph and Tav, whom they have pierced.
The pictures
Remember that every Hebrew letter began as a picture. Aleph was drawn as an ox's head: strength, God. Tav was drawn as two crossed sticks: a cross.
Aleph and Tav. God, and a cross.
Why this is a big deal
Jesus said he was the First and the Last. Fourteen centuries earlier, the first and last letters of the Hebrew alphabet were written into the first sentence of the Bible, and placed right before the words "whom they have pierced."
It was never translated. But it was always there.