Verse Comparison: Matthew 1:25
American Standard Version
and knew her not till she had brought forth a son: and he called his name JESUS.
Amplified® Bible
But he had no union with her as her husband until she had borne {her firstborn} Son; and he called His name Jesus.
Darby English Version
and knew her not until she had brought forth her firstborn son: and he called his name Jesus.
International Standard Version
He did not have marital relations with her until she had given birth to a son; and he named him Jesus.
King James Version
And knew her not till she had brought forth her firstborn son: and he called his name JESUS.
Young's Literal Translation
and did not know her till she brought forth her son -- the first-born, and he called his name Jesus.