זְכֹ֤ר עֲדָתְךָ֨ ׀ קָ֘נִ֤יתָ קֶּ֗דֶם גָּ֭אַלְתָּ שֵׁ֣בֶט נַחֲלָתֶ֑ךָ הַר־צִ֝יּ֗וֹן זֶ֤ה ׀ שָׁכַ֬נְתָּ בּֽוֹ׃
Remember Thy congregation, which Thou hast gotten of old, Which Thou hast redeemed to be the tribe of Thine inheritance; And mount Zion, wherein Thou hast dwelt.
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.