Glossa Ordinaria — as excerpted in the Catena Aurea on Luke 13:22-30

“This question seems to have reference to what had gone before. For in the parable which was given above, He had said, that the birds of the air rested on its branches, by which it might be supposed that there would be many who would obtain the rest of salvation. And because one had asked the question for all, the Lord does not answer him individually, as it follows, And he said unto them, Strive to enter in at the strait gate.”