Yeshayah 20:1-2

Orthodox Jewish Bible

20 In the year [711 B.C.E.] that Tartan came unto Ashdod, (when Sargon Melech Ashur sent him,) and fought against Ashdod, and took it;

² At the same time spoke Hashem by Yeshayah Ben Amotz, saying, Go and remove the sackcloth from off thy loins, and put off thy sandal from thy regel. And he did so, going arom (naked, stripped) and barefoot.