John Chrysostom — as excerpted in the Catena Aurea on Matthew 18:1-6

“And to make this word the rather received. He subjoins a penalty in what follows, Whoso offendeth one of these little ones, & c. as though he had said, As those who for My sake honour one of these, have their reward, so they who dishonour shall undergo the extreme punishment. And marvel not that He calls an evil word an offence, for many of feeble spirit are offended by only being despised,”