The Law of Moses defined exactly what was to be the priest’s portion of every peace offering Leviticus 7:31-35, as it also gave express directions about the burning of the fat Leviticus 7:23-25, Leviticus 7:31. It was therefore a gross act of disobedience and lawlessness on the part of Hophni and Phinehas to take more than the Law gave them. Incidental evidence is afforded by this passage to the existence of the Levitical law at this time.
Related Commentaries of 1 Samuel 2:13
1 Samuel 2:13
13 And the priests' custom with the people was, that, when any man offered sacrifice, the priest's servant came, while the flesh was in seething, with a fleshhook of three teeth in his hand;