The Messiah would be born of a virgin.
OT Prophecy NT Fulfillment
Isaiah 7:14a
"Therefore the LORD himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call His name Immanuel."
Luke 1:34-35
"[34]Then said Mary unto the angel, How shall this be, seeing I know not a man? [35] And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God."

Tanakh - Neviim - Isaiah 7:14a

"Therefore the L-rd Himself shall give you a sign: behold, the young woman shall conceive, and bear a son, and shall call his name Immanuel."

 Hebrew OT - Isaiah 7:14a

ןב תדליו הרה המלעה הנה תוא םכל אוה ינדא ןתי ןכל  
.לא ונמע ומש תארקו  

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