Hebrews 10:22

10:22 let us draw near with a sincere heart in the assurance that faith brings, because we have had our hearts sprinkled clean from an evil conscience and our bodies washed in pure water.

Hebrews 13:9

13:9 Do not be carried away by all sorts of strange teachings. For it is good for the heart to be strengthened by grace, not ritual meals, which have never benefited those who participated in them.