Jeremiah 1:5 (BSB)

“Before I formed you in the womb I knew you, and before you were born I set you apart and appointed you as a prophet to the nations.”

From Jeremiah 1. Also in the ESV.

Commentary on Jeremiah 1:5

• John Calvin (Reformed), Calvin's Commentaries on Jeremiah 1:5: Here Jeremiah explains more fully what he had already mentioned that he had been called from above, for otherwise he would have presumptuously obtruded himself: for no one, as the Apostle says, takes this honor to himself; but the call of God alone raises up prophets and teachers to their dignity {see Hebrews 5:4}.
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Jeremiah 1:4-10: Here is, I. Jeremiah's early designation to the work and office of a prophet, which God gives him notice of as a reason for his early application to that business (Jer 1:4, Jer 1:5): The word of the Lord came to him, with a satisfying assurance to himself that it was the word of the Lord and not a delusion; and God told him, 1.
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Jeremiah 1:5: knew--approved of thee as My chosen instrument (Exo 33:12, Exo 33:17; compare Isa 49:1, Isa 49:5; Rom 8:29). sanctified--rather, "separated." The primary meaning is, "to set apart" from a common to a special use; hence arose the secondary sense, "to sanctify," ceremonially and morally.
• Geneva Bible Notes (Reformed), Geneva Bible Study Notes on Jeremiah 1:5: Before I formed thee in the womb I knew thee; and before thou wast born I sanctified thee, [and] I ordained thee a prophet to the nations. (g) The scripture uses this manner of speech to declare that God has appointed his minsters to their offices before they were born, as in .