But the words of Matthew, This is my beloved Son, and those of Luke, Thou art my beloved Son, convey the same meaning; for the heavenly voice spoke one of these. But Matthew wished to shew that by the words, This is my beloved Son, it was meant rather to declare to the hearers, that He was the Son of God. For that was not revealed to Christ which He knew, but they heard it who were present, and for whom the voice came.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: de Con. Ev. lib. ii. c. 14.