Theophylact of Ohrid
Catena Aurea · Lukasevangelium 12
In the mean time, when there were gathered together an innumerable multitude of people, insomuch that they trode one upon another, he began to say unto his disciples first of all, Beware ye of the leaven of the Pharisees, which is hypocrisy. For there is nothing covered, that shall not be revealed; neither hid, that shall not be known. Therefore whatsoever ye have spoken in darkness shall be heard in the light; and that which ye have spoken in the ear in closets shall be proclaimed upon the housetops.
The Pharisees sought indeed to catch Jesus in His talk, that they might lead away the people from Him. But this design of theirs is reversed. For the people came all the more unto Him gathered together by thousands, and so desirous to attach themselves to Christ, that they pressed one upon another. So mighty a thing is truth, so feeble every where deceit. Whence it is said, And when there were gathered together a great multitude, insomuch that they trode upon one another, he began to sag unto his disciples, Beware ye of the leaven of the Pharisees, which is hypocrisy.