Adam Clarke on Matthew 24:40

Then shall two men - two women - one shall be taken, and the other left - The meaning seems to be, that so general should these calamities be, that no two persons, wheresoever found, or about whatsoever employed, should be both able to effect their escape; and that captivity and the sword should have a complete triumph over this unhappy people.

Two women shall be grinding - Women alone are still employed in grinding the corn in the east; and it is only when despatch is required, or the uppermost millstone is heavy, that a second woman is added. See Wakefield, and Harmer, Obs. vol. i. 253. That they were formerly thus employed, see Exo 11:5, and the note there. See also Isa 47:2.