Righteous Simeon the God-Receiver was, according to the testimony of the holy Evangelist Luke, a just and devout man waiting for the consolation of Israel, and the Holy Spirit was upon him (Luke 2:25). God promised him that he would not die until the promised Messiah, Christ the Lord, came into the world.
Ancient historians tell us that the Egyptian pharaoh Ptolemy II Philadelphus (285-247 B.C.) wished to include texts of Holy Scripture in the famous Library at Alexandria. He invited scholars from Jerusalem, and the Sanhedrin sent their wise men. The Righteous Simeon was one of the seventy scholars who came to Alexandria to translate the Holy Scriptures into Greek. The completed work was called “The Septuagint,” and is the version of the Old Testament used by the Orthodox Church.
Saint Simeon was translating a book of the Prophet Isaiah, and read the words: “Behold, a virgin shall conceive in the womb, and shall bring forth a Son” (Is 7:14). He thought that “virgin” was inaccurate, and he wanted to correct the text to read “woman.” At that moment an angel appeared to him and held back his hand saying, “You shall see these words fulfilled. You shall not die until you behold Christ the Lord born of a pure and spotless Virgin.”
https://oca.org/saints/lives/2019/02/03/100409-holy-righteous-simeon-the-god-receiver