1 Samuel 2:28-29

28and choose him out of all the tribes of Israel, to be my priest, to offer upon mine altar, to burn incense, to wear the ephod before me? and I gave unto the house of thy father all the offerings by fire of the children of Israel.

29Wherefore do ye trample upon my sacrifice and upon mine oblation which I have commanded [in my] habitation? And thou honourest thy sons above me, to make yourselves fat with the primest of all the oblations of Israel my people.