Adam Clarke's Commentary on the Bible

Verse 5 (Jeremiah 1:5)

Before I formed thee - I had destined thee to the prophetic office before thou wert born: I had formed my plan, and appointed thee to be my envoy to his people. St. Paul speaks of his own call to preach the Gospel to the Gentiles in similar terms, Galatians 1:15 , Galatians 1:16 .

- Adam Clarke's Commentary on the Bible