1 Samuel 10:8

8. Thou shalt go down before me to Gilgal This is not a command, but a prediction. Samuel’s prophetic eye fastens upon the future turning point in Saul’s career, when, threatened by an attack from the Philistines, and forsaken by many of his soldiers, he shall be called upon to show his faith in God. Perhaps Samuel added other instructions not recorded here; but it was sufficient now for Saul to know that there would come a time when he would be waiting at Gilgal for Samuel’s arrival, and when that occasion came he must wait for special instruction from the Lord. For the manner in which this prophecy was fulfilled, and how Saul failed to observe these instructions, see 1 Samuel 13:8. It was fitting that at this first interview Samuel should drop a word of warning and counsel for Saul’s guidance at that coming time of his greatest danger.