Albert Barnes Commentary 1 Samuel 10:8

"And thou shalt go down before me to Gilgal; and, behold, I will come down unto thee, to offer burnt-offerings, and to sacrifice sacrifices of peace-offerings: seven days shalt thou tarry, till I come unto thee, and show thee what thou shalt do." — 1 Samuel 10:8 (ASV)

Seven days you shall wait... - The appointment made here is not to be confused with that mentioned in the marginal reference.