Hebrews 7:19

7:19 for the law made nothing perfect. On the other hand a better hope is introduced, through which we draw near to God.

Hebrews 7:28

7:28 For the law appoints as high priests men subject to weakness, but the word of solemn affirmation that came after the law appoints a son made perfect forever.

Hebrews 9:9

9:9 This was a symbol for the time then present, when gifts and sacrifices were offered that could not perfect the conscience of the worshiper.