Midrash su Levitico 6:15

1) (Vayikra 6:15) ("And the Cohein that is anointed in his place from his sons shall offer it, a statute forever for the L–rd; it shall be entirely smoked.") "anointed": This tells me only of the (high-priest) anointed with the anointing oil. Whence do I derive the same (that he brings a griddle meal-offering every day) for the many-vestmented priest (see Shemoth 29:30)? From "and the Cohein that is anointed." I might think that I include also the priest anointed for war. It is, therefore, (to negate this) written "in his place from his sons." Only one whose son stands in his place brings the tenth of an ephah — to exclude the priest anointed for war, whose son does not stand in his place. And whence is it derived that his son does not stand in his place? From (Shemoth, Ibid.): "Seven days shall he clothe himself in them, his son that is priest in his place, who comes to the tent of meeting to minister in the holy place." Only the son of one "who comes to the tent of meeting, etc." stands in his place — to exclude (the son of) the priest anointed for war, who does not come to the tent of meeting to minister in the holy place.

2) "his sons": These are ordinary Cohanim. But perhaps they are the high-priests, (who are like him in the high-priesthood). "The priest that is anointed in his place from among his sons shall offer it" (Vayikra 6:15) already refers to the high-priest. How, then, am I to understand "his sons" (here)? As referring to ordinary priests.

2) "… from his sons shall offer it": We are hereby taught that his son takes precedence to all others. I might think that this is so even when he cannot fill his father's place (in wisdom and in fear of Heaven). It is, therefore, written (Vayikra 16:32): "… who shall fill his place": When he is qualified to fill his father's place, he takes precedence to all others. If he is not qualified to do so, let another come and serve in his stead.