3 So Jonah got up and went to Nineveh according to the Lord’s command.

Now Nineveh was an extremely large city,(a)(A) a three-day walk.(b)
4 Jonah set out on the first day of his walk in the city and proclaimed,(B) “In 40 days Nineveh will be demolished!”

Footnotes:

a. Jonah 3:3: Or was a great city to God
b. Jonah 3:3: Probably the time required to cover the city on foot

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.