Jamieson, Fausset & Brown

in six . . . yea, in seven-- (Pro 6:16; Amo 1:3). The Hebrew idiom fixes on a certain number (here "six"), in order to call attention as to a thing of importance; then increases the force by adding, with a "yea, nay seven," the next higher number; here "seven," the sacred and perfect number. In all possible troubles; not merely in the precise number "seven."