John Chrysostom

"Yea, and all the prophets," etc.: all this is calculated to attract. "Yea, and all the prophets," says the Apostle. "from Samuel." He refrains from enumerating them singly, not to make his discourse too long; but having alleged that decisive testimony of Moses, he passes by the rest.

Homily on Acts 9 ↗

Oecumenius

This also must be implied here: To our fathers, as the sense may be: All likewise, as many as have spoken to our fathers.

Commentary on Acts ↗

Bede

And all the prophets from Samuel and onwards. Although the patriarchs and saints of earlier times prophesied concerning Christ through their words and deeds, the proper time of the prophets, I say, is that which began with Samuel, under whom the times of the kings in Judea began, and continued until the end of the Babylonian captivity.

Commentary on Acts ↗

Hippolytus of Rome

Now, after the death of Moses and Joshua, and after the judges, arose David, who was deemed worthy of bearing the name of father of the Saviour himself; and he first gave to the Hebrews a new style of psalmody, by which he abrogates the ordinances established by Moses with respect to sacrifices, and introduces the new hymn and a new style of jubilant praise in the worship of God; and throughout his whole ministry he teaches very many other things that went beyond the law of Moses.

Hippolytus Exegetical Fragments ↗