Charles Ellicott Commentary Exodus 25:6

"oil for the light, spices for the anointing oil, and for the sweet incense," — Exodus 25:6 (ASV)

Oil for the light. —It is assumed that the “sanctuary,” which is to be built (Exodus 25:8), will need to be lit. Oil therefore is to be provided for the lighting. Later on (Exodus 27:20), it is laid down that the oil must be pure olive oil beaten.

Spices for anointing oil. —Rather, for the anointing oil. Here, again, there is an assumption that anointing oil will be needed, and that spices will be a necessary ingredient in such oil. We find later that the Tabernacle itself, all its vessels, and the priests appointed to serve in it, had to be consecrated by anointing (Exodus 29:7; Exodus 29:36; Exodus 30:26–30). The particular spices to be mixed with the “anointing oil” are enumerated in Exodus 30:23-24.

And for sweet incense. —Rather, for the sweet incense—the incense, i.e., which would have to be burned. (and for the composition of the incense, Exodus 30:34.)