Sion — His church and people. They — His servants, as is explained in the following verse. There — In the literal Canaan for a long time, in the heavenly Canaan for ever.
Related Commentaries of Psalms 69:35
Psalms 69:35
35 For God will save Zion, and will build the cities of Judah: that they may dwell there, and have it in possession.