The smith — Both the smith that makes warlike instruments, and the soldier that uses them, are my creatures, and totally at my command, and therefore they cannot hurt you without my leave. The waster — To destroy only whom and when I please.
Related Commentaries of Isaiah 54:16
Isaiah 54:16
16 Behold, I have created the smith that bloweth the coals in the fire, and that bringeth forth an instrument for his work; and I have created the waster to destroy.