Theophylact of Ohrid — as excerpted in the Catena Aurea on Luke 17:1-2

“Because the Pharisees were covetous and railed against Christ when He preached poverty, He put to them the parable of the rich man and Lazarus. Afterwards, in speaking with His disciples concerning the Pharisees, He declares them to be men who caused division, and placed obstacles in the divine way. As it follows; Then said he unto his disciples, It is impossible but that offences will come, that is, hindrances to a good life and which is pleasing to God.”