Taken from Here: http://www.earlychristianwritings.com/e-catena/matthew28.html
Matt. 28:19 – NIV, NAB – in Recognitions of Clement II
In the first place, I shall answer your assertion, that I set forth the words of my Master, and from them resolve matters about which there is still doubt. Our Lord, when He sent us apostles to preach, enjoined us to teach all nations
Matt. 28:19 – NIV, NAB – in Clementine Homily XVII
“Knowing therefore that we knew all that was spoken by Him, and that we could supply the proofs, He sent us to the ignorant Gentiles to baptize them for remission of sins, and commanded us to teach them first.
Matt. 28:19 – NIV, NAB – in Origen Commentary on Matthew Book X
And the Apostles on this account left Israel and did that which had been enjoined on them by the Saviour, “Make disciples of all the nations,”