GOD'S WORD® Translation
"You did a foolish thing," Samuel told Saul. "You didn't follow the command of the LORD your God. [If you had,] the LORD would have established your kingdom over Israel permanently.

American Standard Version
And Samuel said to Saul, Thou hast done foolishly; thou hast not kept the commandment of Jehovah thy God, which he commanded thee: for now would Jehovah have established thy kingdom upon Israel for ever.

Berean Study Bible
“You have acted foolishly,” Samuel declared. “You have not kept the command that the LORD your God gave you; if you had, the LORD would have established your kingdom over Israel for all time.

Douay-Rheims Bible
And Samuel said to Saul: Thou hast done foolishly, and hast not kept the commandments of the Lord thy God, which he commanded thee. And if thou hadst not done thus, the Lord would now have established thy kingdom over Israel for ever.

English Revised Version
And Samuel said to Saul, Thou hast done foolishly: thou hast not kept the commandment of the LORD thy God, which he commanded thee: for now would the LORD have established thy kingdom upon Israel for ever.

King James Bible
And Samuel said to Saul, Thou hast done foolishly: thou hast not kept the commandment of the LORD thy God, which he commanded thee: for now would the LORD have established thy kingdom upon Israel for ever.

World English Bible
Samuel said to Saul, "You have done foolishly. You have not kept the commandment of Yahweh your God, which he commanded you; for now Yahweh would have established your kingdom on Israel forever.

Young's Literal Translation
And Samuel saith unto Saul, 'Thou hast been foolish; thou hast not kept the command of Jehovah thy God, which He commanded thee, for now had Jehovah established thy kingdom over Israel unto the age;

1 Samuel 13:13 Additional Translations ...