NET
18 If only you had obeyed my commandments, prosperity would have flowed to you like a river, deliverance would have come to you like the waves of the sea.
Darby
18 Oh that thou hadst hearkened to my commandments! Then would thy peace have been as a river, and thy righteousness as the waves of the sea;
KJV
18 O that thou hadst hearkened to my commandments! then had thy peace been as a river, and thy righteousness as the waves of the sea: