Exodus 30:35-37

35Prepare expertly blended incense from these; it is to be seasoned with salt, pure and holy.

36Grind some of it into a fine powder and put some in front of the testimony in the tent of meeting, where I will meet with you. It must be especially holy to you.

37As for the incense you are making, you must not make any for yourselves using its formula. It is to be regarded by you as holy — belonging to the Lord.