Rashi on Psalms
which You acquired from time immemorial Before the creation of the world, as it is said (below 90: 1,2): “You were a dwelling place for us, etc., before mountains were formed.”
Rashi on Psalms
on which You dwelt Heb. זה שכנתבו, this upon which You dwelt. This is an improvement of the language, as (Isa. 42: 24): “against whom (זו) we sinned.” It is like אשר שכנתבו, on which You dwelt.