Exodus 30:6, 36

Place the incense altar just outside the inner curtain that shields the Ark of the Covenant, in front of the Ark’s cover—the place of atonement—that covers the tablets inscribed with the terms of the covenant. I will meet with you there.

Grind some of the mixture into a very fine powder and put it in front of the Ark of the Covenant, where I will meet with you in the Tabernacle. You must treat this incense as most holy.