Jamieson, Fausset and Brown on 1 Samuel 10:2

2. When thou art departed from me to-day--The design of these specific predictions of what should be met with on the way, and the number and minuteness of which would arrest attention, was to confirm Saul's reliance on the prophetic character of Samuel, and lead him to give full credence to what had been revealed to him as the word of God.

Rachel's sepulchre--near Beth-lehem (see on Ge 35:16).

Zelzah--or Zelah, now Bet-jalah, in the neighborhood of that town.