New Revised Standard Version
Jonah began to go into the city, going a day’s walk. And he cried out, “Forty days more, and Nineveh shall be overthrown!”

Contemporary English Version
After walking for a day, Jonah warned the people, "Forty days from now, Nineveh will be destroyed!"

New American Bible
Jonah began his journey through the city, and when he had gone only a single day’s walk announcing, “Forty days more and Nineveh shall be overthrown,”

Douay-Rheims Bible
And Jonah arose, and went to Ninive, according to the word of the Lord: now Ninive was a great city of three days' journey.

And Jonah arose, and went to Ninive, according to the word of the Lord: now Ninive was a great city of three days' journey.

Yet.

Jonah 3:10 Who can tell if God will turn, and forgive: and will turn away from his fierce anger, and we shall not perish?

Deuteronomy 18:22 Thou shalt have this sign: Whatsoever that same prophet foretelleth in the name of the Lord, and it cometh not to pass: that thing the Lord hath not spoken, but the prophet hath forged it by the pride of his mind: and therefore thou shalt not fear him.

2 Kings 20:1,6 In those days Ezechias was sick unto death: and Isaias, the son of Amos, the prophet, came and said to him: Thus saith the Lord God: Give charge concerning thy house, for thou shalt die, and not llve. . . .

Jeremiah 18:7-10 I will suddenly speak against a nation, and against a kingdom, to root out, and to pull down, and to destroy it. . . .