What verse was montag saving for their arrival in the city? why?

The verse was Montag putting something aside for their landing in the city is the beneath, he was sparing it since they were recollecting and saying verses from books they had perused some time recently.

"And on either side of a river was there a tree of life, which bare twelve manner of fruits, and yielded her fruit every month; And the leaves of the tree were for the healing of the nations."