Exodus 16:18

He that gathered much had nothing over - Because his gathering was in proportion to the number of persons for whom he had to provide. And some having fewer, others more in family, and the gathering being in proportion to the persons who were to eat of it, therefore he that gathered much had nothing over, and he that gathered little had no lack. Probably every man gathered as much as he could; and then when brought home and measured by an omer, if he had a surplus, it went to supply the wants of some other family that had not been able to collect a sufficiency, the family being large, and the time in which the manna might be gathered, before the heat of the day, not being sufficient to collect enough for so numerous a household, several of whom might be so confined as not to be able to collect for themselves. Thus there was an equality, and in this light the words of St. Paul, 2 Corinthians 8:15 , lead us to view the passage. Here the 36th verse should come in: Now an omer is the tenth part of an ephah.