From the early Church Fathers to now.
“These are the mansions of the children of Israel, who went out of Egypt by their troops under the conduct of Moses and Aaron,”
“The one hand of Moses was not enough for going forth from Egypt, and the hand of Aaron was also needed. Moses stands for knowledge of the law; Aaron, for skill in making sacrifices and immolations to God. It is therefore necessary for us when we come forth from Egypt to have not only the knowledge of the law and of faith but also the fruits of works well pleasing to God.”
“Unrolling the book still further, [Fabiola] came to the passage in which is given the list of all the halting places by which the people after leaving Egypt made its way to the waters of Jordan. And when she asked me the meaning and reason of each of these, I spoke doubtfully about some, dealt with others in a tone of assurance and in several instances simply confessed my ignorance. Hereupon she began to press me harder still, expostulating with me as though it were a thing unallowable that I should be ignorant of what I did not know, yet at the same time affirming her own unworthiness to understand mysteries so deep.”
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.