Before I formed you in the womb I knew you; and before you came forth out of the womb I sanctified you, and I ordained you a prophet unto the nations.
All Commentaries on Jeremiah 1:5 Go To Jeremiah 1
Ambrose of Milan
AD 397
To show them, however, the weakness and transparency of their objection, though it has no real relation to any truth, divine or human, I will prove to them that people have existed before they were born. Let them show that Jacob had not been appointed and ordained, even before he was born. While yet hidden in the secret chamber of his mother’s womb, he supplanted his brother. Let them show that Jeremiah had not likewise been so, before his birth, “Before I formed you in your mother’s womb, I knew you; and before you came forth from the belly, I sanctified you, and appointed you for a prophet amongst the nations.” … What do you [Arians] mean by your principle that “before he was begotten he did not exist”? Was the Father engaged for some time in conception, so that certain epochs passed away before the Son was begotten?