John Wesley on 1 Samuel 16:5

He sanctified - It seems evident that there was something peculiar in Jesse's invitation. For first, both he and his sons were invited, whereas the others were only invited for their own persons. Secondly, the different phrase here used, that he sanctified these, when he only bade the other sanctify themselves; argues a singular care of Samuel in their sanctification. Which makes it probable, that the rest were only to join with them in the act of sacrificing; but these, and only these, were invited to feast upon the remainders of the sacrifices.