Matthew 1:25

25 and knew her not till she had brought forth a son: and he called his name JESUS.

Matthew 1:25 In-Context

23 Behold, the virgin shall be with child, and shall bring forth a son, And they shall call his name Immanuel; which is, being interpreted, God with us.
24 And Joseph arose from his sleep, and did as the angel of the Lord commanded him, and took unto him his wife;
25 and knew her not till she had brought forth a son: and he called his name JESUS.
The American Standard Version is in the public domain.