So Samuel called upon the LORD, and the LORD sent thunder and rain that day, and all the people greatly feared the LORD and Samuel.
Two things Samuel here aims at: - I. To convince the people of their sin in desiring a king. They were now rejoicing before God in and with their king (Sa1 11:15), and offering to God the sacrifices of praise, which they hoped God would accept; and this perhaps made them think that there was no harm in their asking a king, but really they had done well in it.
Commenting on 1 Samuel 12:16-25
So Samuel called unto the Lord,.... Not in an authoritative way, or by way of command, but by prayer; so the Targum renders the clause in the preceding verse,"I will pray before the Lord:" and the Lord sent thunder and rain that day; immediately, though there was no appearance of it; it was harvest time, and a fine harvest day.
The Lord sent thunder and rain that day - This was totally unusual; and, as it came at the call of Samuel, was a most evident miracle. Greatly feared the Lord - They dreaded His terrible majesty; and they feared Samuel, perceiving that he had so much power with God.