ייִדישער מחשבֿה אויף ישעיהו 66:7

(Isa. 66:6) “a sound of tumult comes from the city” -- The verse continues: “a sound from the Sanctuary, the sound of the Lord paying back his enemies.” The next verse reads: “before she feels labor pains, she gives birth” [Isa. 66:7]. Similarly, we find “the sound [or voice] of the herald, ” which refers to Eliyahu who is the foundation of the root of Mashiach ben Yosef.