Adam Clarke on Leviticus 6:15

His handful of the flour - An omer of flour, which was the tenth part of an ephah, and equal to about three quarts of our measure, was the least quantity that could be offered even by the poorest sort, and this was generally accompanied with a log of oil, which was a little more than half a pint. This quantity both of flour and oil might be increased at pleasure, but no less could be offered.