[3] It is mentioned in the Völuspá: Stóð fyr norðan, / á Niðavöllom / salr úr gulli / Sindra ættar (Stood to the north, a dark field, Halls of gold, Sindri's Clan").
One interpretation of the above verse would read like this: Before you reach the north (Niflheim being the world furthest to the north), A dark dwelling stands (The dwarf world), In halls of gold, Sindri's bloodline lives.
And ættar means bloodline, or in this case most likely kin or tribe.
The dwarfs' world is mentioned in the Prose Edda by Snorri Sturluson as Svartálfaheimr.
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