זְכֹ֤ר עֲדָתְךָ֨ ׀ קָ֘נִ֤יתָ קֶּ֗דֶם גָּ֭אַלְתָּ שֵׁ֣בֶט נַחֲלָתֶ֑ךָ הַר־צִ֝יּ֗וֹן זֶ֤ה ׀ שָׁכַ֬נְתָּ בּֽוֹ׃
求你記念你古時所得的會眾，就是你所贖回、作你產業的支派；也記念你所居住的這錫安山。
Rashi
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 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.