Isa 48:1-22. The things that befall Babylon Jehovah predicted long before, lest Israel should attribute them, in its “obstinate” perversity, to strange gods (Isa 48:1-5).
the waters of Judah - spring from the fountain of Judah (Num 24:7; Deu 33:28; Psa 68:26; Margin). Judah has the “fountain” attributed to it, because it survived the ten tribes, and from it Messiah was to spring.
swear by ... Lord - (Isa 19:18; Isa 45:23; Isa 65:16).