Beneath the mountains music woke:
The harpers harped, the minstrels sang,
And at the gates the trumpets rang.
The world is grey, the mountains old,
The forge's fire is ashen-cold;
No harp is wrung, no hammer falls:
The darkness dwells in Durin's halls;
The shadow lies upon his tomb
In Moria, in Khazad-dûm.
But still the sunken stars appear
In dark and windless Mirrormere;
There lies his crown in water deep,
Till Durin wakes again from sleep.
This is an insight into the fact that the dwarves are still on the watch for the return of their “Golden Age” that Durin had brought to them. 
 The Durin’s Folk believe that Durin will reincarnate seven times and await for his seventh incarnation to “wake again” and lead them.