When the high priest entered the Most Holy he brought along an incense burner or censer in order to fill the Most Holy with incense smoke. This was done in order to prepare the situation for the high priest to sprinkle the blood of the Atonement Day sacrifices toward the golden ark of the covenant.

This had a golden censer and the ark of the covenant overlaid all around with gold, in which were the golden jar having the manna and the rod of [High Priest] Aaron that budded and the tablets of the covenant;