Cyril of Alexandria

The Pharisee, while our Lord still continued on speaking, invites Him to his own house. As it is said, And while he was speaking, a certain Pharisee besought him to dine with him.

Catena Aurea by Aquinas ↗

Theophylact of Ohrid

Though the Lord knows the ill-will of the Pharisees, He nevertheless dines with them because they were crafty and in need of correction. For He dines with them in order to have an occasion for the improvement of their morals.

Commentary on Luke ↗

Augustine of Hippo

For in order to relate this, Luke has made a variation from Matthew, at that place where both had mentioned what our Lord said concerning the sign of Jonah, and the queen of the south, and the unclean spirit; after which discourse Matthew says, While he yet talked to the people, behold his mother and his brethren stood without desiring to speak to him; but Luke having also in that discourse of our Lord related some of our Lord's sayings which Matthew omitted, now departs from the order which he had …

Catena Aurea by Aquinas ↗

Bede

And while he was speaking, a certain Pharisee asked him to dine with him, and he went in and reclined. Luke carefully does not say, "And when he had spoken these things," but "While he was speaking," to show that he was invited to dine by the Pharisee not immediately after finishing the words he had set out, but after some others were interposed. …

On the Gospel of Luke ↗

Bonaventure

And as he was speaking, one asked him etc. After the Evangelist commended the simplicity of right intention, in this part he confutes the deceitfulness of malignant dissimulation. This part has two sections. In the first of which there is set forth a rebuke of duplicity: in the second there is added a threatening of calamity, at: But woe to you, Pharisees etc. …

Commentary on Luke, Chapter 11 ↗