djar-em-rekh:

“Although resin burned in the temples could represent the bodies of multiple different gods, the incense and libations used to “open the mouths” of mummies primarily referenced Osiris.”

— Elliott Wise:
An “Odor of Sanctity”: The Iconography, Magic,and Ritual of Egyptian Incense

in:  Studia Antiqua 7.1, p. 75