Gregory the Great — as excerpted in the Catena Aurea on Luke 14:15-24

“(in Hom. 36.) They then who, broken down by the calamities of this world, return to the love of God, are compelled to enter. But very terrible is the sentence which comes next. For I say unto you, That none of those men which were bidden shall taste of my supper. Let no one then despise the call, lest if when bidden he make excuse, when he wishes to enter he shall not be able.”