Which line from "Nothing Gold Can Stay" contains a pun

In the excerpt of puck’s speech shown here, how many couplets do you see? if we shadows have offended, think but this, and all is mended, that you have but slumber'd here while these visions did appear. and this weak and idle theme, no more yielding but a dream,

Hi how are i have some questions about english subject can you answer for me ?

Which word from the stanza can you use as a clue to determine the meaning of the word vales ?