Which line in this excerpt from jonathan swift's "a modest proposal" uses the rhetorical device of irony?

did you look on google yet it might have the answer for you

1.the hosts on two opposing mountains stood,  

2.thick as the foliage of the waving wood;  

3.between them an extensive valley lay,  

4.o'er which the gleaming armour pour'd the day,  

5.when from the camp of the philistine foes,

6. dreadful to view, a mighty warrior rose; in the dire deeds of bleeding battle skill'd,

not exaxtly

explanation: it depends on the situation like if u do something good there will be good consequences which arent punishments but if you do somthing bad there will be bad consequences which are punishements.