The interpretation timeline
Luke 9:6 Douay-Rheims

And going out, they went about through the towns, preaching the gospel, and healing every where.

A.D. 339 – 1771 3 witnesses

Patristic

before A.D. 750
339
A.D.
c. A.D. 260–339
“But when the Lord had girded His disciples as soldiers of God with divine virtue and wise admonitions, sending them to the Jews as teachers and physicians, they afterwards went forth, as it follows, And they departed, and went through the towns preaching the gospel, and healing every where.”
397
A.D.
Ambrose of Milan Patristic
A.D. 339–397
“Of what kind then he ought to be who preaches the Gospel of the kingdom of God is marked out by these Gospel precepts; that is, he must not require the supports of secular aid; and clinging wholly to faith, he must believe that the less he requires those things, the more they will be supplied to him.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And they departed,.... That is, the apostles, as the Syriac and Persic versions express it: they went from Christ, and the place where he was, from Capernaum, at least from some place in Galilee: and went through the towns; the Syriac, Persic, and Ethiopic versions add, "and cities"; that is, of Judea, as well as Galilee, even the whole land of Israel: preaching the Gospel; which explains what is meant by the kingdom of God, Luk 9:2 and healing everywhere; all sorts of bodily diseases, wherever they came.”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.