Jamieson, Fausset and Brown on Isaiah 30:4

4. his--Judah's (compare Is 9:21).

at Zoan--are already arrived there on their errand to Pharaoh (see Is 19:11).

came to Hanes--are come there. West of the Nile, in central Egypt: Egyptian Hnes; the Greek Heracleopolis: perhaps the Anysis of Herodotus (2.137); according to Grotius, Tahpanhes contracted (Jr 43:7-9); the seat of a reigning prince at the time, as was Zoan, hence the Jewish ambassadors go to both.