Augustine of Hippo — as excerpted in the Catena Aurea on Luke 11:1-4

“(in Enchirid. c. 116.) It seems according to the Evangelist Matthew, that the Lord’s prayer contains seven petitions, but Luke has comprehended it in five. Nor in truth does the one disagree from the other, but the latter has suggested by his brevity how those seven are to be understood. For the name of God is hallowed in the spirit, but the kingdom of God is about to come at the resurrection of the body. Luke then, shewing that the third petition is in a manner a repetition of the two former, wished to make it so understood by omitting it. He then added three others. And first, of daily bread, saying, Give us day by day our daily bread.”