As it is written, He that had gathered much had nothing over; and he that had gathered little had no lack.
All Commentaries on 2 Corinthians 8:15 Go To 2 Corinthians 8
John Chrysostom
AD 407
This happened in the case of the manna, when those who gathered more and those who gathered less were found to have the same quantity. God did this in order to punish greed, and Paul recalls it both to alarm them by what happened then and to persuade them never to desire more than they already have or to be anxious because they have less.