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 to thee, and show thee what thou shalt do.

Wesley's Notes

10:8 Till I come - This, though now mentioned and commanded, was not immediately to be performed; as is evident, partly from the whole course of the story, (which shews, that Saul and Samuel, and the people, first met at Mizpeh, ver.17, and c. where Saul was chosen by God, and accepted by the people as king; and afterwards went to Gilgal once before the time here spoken of, chap.11:14,15,) and partly, by comparing this place with chap.13:8, and c. where we find Saul charged with the violation of this command, two years after the giving of it. It seems this is given as a standing rule for Saul to observe while Samuel and he lived; that in case of any great future difficulties, as the invasion of enemies, Saul should resort to Gilgal, and call the people thither, and tarry there seven days, which was but a necessary time for gathering the people, and for the coming of Samuel thither. And Gilgal was chosen for this purpose, because that place was famous for the solemn renewing of the covenant between God and Israel, Jos 4:19 - 24, and for other eminent instances of God's favour to them, the remembrance whereof was a confirmation of their faith; and because it was a very convenient place for he tribes within and without Jordan to assemble, and consult, and unite their forces together upon such occasions.

Jamieson-Fausset-Brown Bible Commentary

8. thou shalt go down before me to Gilgal-This, according to Josephus, was to be a standing rule for the observance of Saul while the prophet and he lived; that in every great crisis, such as a hostile incursion on the country, he should repair to Gilgal, where he was to remain seven days, to afford time for the tribes on both sides Jordan to assemble, and Samuel to reach it.

Matthew Henry's Concise Commentary

10:1-8 The sacred anointing, then used, pointed at the great Messiah, or Anointed One, the King of the church, and High Priest of our profession, who was anointed with the oil of the Spirit, not by measure, but without measure, and above all the priests and princes of the Jewish church. For Saul's further satisfaction, Samuel gives him some signs which should come to pass the same day. The first place he directs him to, was the sepulchre of one of his ancestors; there he must be reminded of his own mortality, and now that he had a crown before him, must think of his grave, in which all his honour would be laid in the dust. From the time of Samuel there appears to have been schools, or places where pious young men were brought up in the knowledge of Divine things. Saul should find himself strongly moved to join with them, and should be turned into another man from what he had been. The Spirit of God changes men, wonderfully transforms them. Saul, by praising God in the communion of saints, became another man, but it may be questioned if he became a new man.