God's man was refused and rejected by our forefathers at Mt. Sinai. See also verse 23. Rephan and images used in worshiping them. Moloch was the sun-god also known as Baal. The Law was housed in the Tabernacle in the wilderness .
Testimony refers to Scripture.
God put His Spirit there also, but He was not confined there as this verse clearly shows. Heaven is my throne and the earth is my footrest. The reader may wish to review the comments before verse one. Now the tone changes to You people. They perpetually persecuted prophets .