John Chrysostom

"And breaking bread from house to house, did take their portion of food with gladness and singleness of heart, praising God, and having favor with all the people." It seems to me that in mentioning "bread," he here signifies fasting and hard life; for they "took their portion of food," not of dainty fare. "With gladness," he says. Seest thou that not the dainty fare, but the food made the enjoyment. For they that fare daintily are under punishment and pain; but not so these. …

Homily on Acts 7 ↗

Theophylact of Ohrid

"Every day they continued with one accord in the temple." Not one day or two or three, but daily and with one accord, as if in one soul. Notice: the Jews who believed did nothing else but constantly remained in the temple, since, having become more attentive to the true faith, they were also filled with great reverence for this sacred place. And the apostles did not draw them away from there, so as not to harm them. "Breaking bread from house to house." He means the sacred house even now, because they ate in this house. …

Commentary on Acts ↗

Oecumenius

They now call the house the sacred one; for in it they used to eat. And the phrase "breaking bread" he said so that their simple and humble sustenance of life might be revealed. For when they were breaking bread they partook of food, but did not live luxuriously. Therefore, too they regulated their life by faith, and were mutually loving with all the people. For even if the chief priests rose up against them from envy, yet they had favor with the people. This was shown by their mercy and pure conduct. …

Commentary on Acts ↗

Augustine of Hippo

First of all, because you are gathered together in one that you might live harmoniously (unanimes) and that there be one soul and one heart toward God. And you should not call anything your own, but let all things be common to you and distributed to each one of you according to need.

Letter 211.5 ↗