Isa 19:20

19:20 sign . . . witness. The altar (v. 19) signifies their commitment to the Lord (cf. Gen. 12:8; 28:22; Josh. 22:26–29).

savior and defender. God will fill these roles to deliver them from oppressors, as He did for Israel in the days of the judges (Judg. 2:18; 3:9, 15).