1. Hebrews 5:5 (ESV)
  2. Exposition

From where does the quotation, "You are my Son, today I have begotten you," come?

Hebrews 5:5 (ESV)

5 So also Christ did not exalt himself to be made a high priest, but was appointed by him who said to him, “You are my Son, today I have begotten you”;

This is a quotation from Psalm 2:7.1