So the people of Nineveh believed God, and proclaimed a fast, and put on sackcloth, from the greatest of them even to the least of them.
All Commentaries on Jonah 3:5 Go To Jonah 3
George Leo Haydock
AD 1849
God. They were convinced that he had wrought such wonders in the person of Jonas, with a desire of their welfare, particularly as he allowed them some delay. Accordingly they did penance for about forty days, and their conversion was so sincere, that Christ proposes it to his disciples, Matthew xii. 41. (Calmet)
Thus "the city was overturned in its perverse manners. "(St. Augustine, City of God xxi. 24., and Psalm l.)
They were at an end, and the city was renovated. (Haydock)