Isaiah 48:18

16 Come near to Me and listen to this: From the beginning I have not spoken in secret; from the time it happened, I was there.” And now the Lord GOD has sent me, accompanied by His Spirit.

17 Thus says the LORD your Redeemer, the Holy One of Israel: “I am the LORD your God, who teaches you for your benefit, who directs you in the way you should go.

If only you had paid attention to My commandments, your peace would have been like a river, and your righteousness like waves of the sea.

19 Your descendants would have been as countless as the sand, and your offspring as numerous as its grains; their name would never be cut off or eliminated from My presence.”

20 Leave Babylon! Flee from the Chaldeans! Declare it with a shout of joy, proclaim it, let it go out to the ends of the earth, saying, “The LORD has redeemed His servant Jacob!”

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
If only you had paid attention to My commandments, your peace would have been like a river, and your righteousness like waves of the sea.
KJV
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:
WEB
Oh that you had listened to my commandments! Then your peace would have been like a river and your righteousness like the waves of the sea.
ASV
Oh that thou hadst hearkened to my commandments! then had thy peace been as a river, and thy righteousness as the waves of the sea:
DARBY
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;
BLB
If only you had paid attention to My commandments! Then your peace would have been like a river, and your righteousness like the waves of the sea;
ÅB
Gid du ville akte på mine bud! Da skulle din fred bli som elven, og din rettferdighet som havets bølger;
OTB
Om du bare hadde vært oppmerksom på Mine bud, ville din fred vært som en elv, og din rettferdighet som havets bølger.
B1930
Gid du vilde akte på mine bud! Da skulde din fred bli som elven, og din rettferdighet som havets bølger;

Study notes (Tyndale)

Original text and word study

Cross references