Hebrews 5:14

5:14 But solid food is for the mature, whose perceptions are trained by practice to discern both good and evil.

Hebrews 12:18

12:18 For you have not come to something that can be touched, to a burning fire and darkness and gloom and a whirlwind

Hebrews 13:11

13:11 For the bodies of those animals whose blood the high priest brings into the sanctuary as an offering for sin are burned outside the camp.