A.T. Robertson Commentary Luke 17:35

"There shall be two women grinding together; the one shall be taken, and the other shall be left." — Luke 17:35 (ASV)

Shall be grinding (εσοντα αληθουσα). Periphrastic future active indicative of αληθω, an old verb only in the N.T. here and Mt 24:41.

Together (επ το αυτο). In the same place, near together as in Ac 2:1.