1 Samuel 9:15
15, 16. Now the Lord had told Samuel in his ear a day before—The description of Saul, the time of his arrival, and the high office to which he was destined, had been secretly intimated to Samuel from heaven. The future king of Israel was to fight the battles of the Lord and protect His people. It would appear that they were at this time suffering great molestation from the Philistines, and that this was an additional reason of their urgent demands for the appointment of a king (see 1Sa 10:5; 13:3).
1 Samuel 10:24
17-25. Samuel called the people together . . . at Mizpeh—a shaft-like hill near Hebron, five hundred feet in height. The national assemblies of the Israelites were held there. A day having been appointed for the election of a king, Samuel, after having charged the people with a rejection of God's institution and a superseding of it by one of their own, proceeded to the nomination of the new monarch. As it was of the utmost importance that the appointment should be under the divine direction and control, the determination was made by the miraculous lot, tribes, families, and individuals being successively passed until Saul was found. His concealment of himself must have been the result either of innate modesty, or a sudden nervous excitement under the circumstances. When dragged into view, he was seen to possess all those corporeal advantages which a rude people desiderate in their sovereigns; and the exhibition of which gained for the prince the favorable opinion of Samuel also. In the midst of the national enthusiasm, however, the prophet's deep piety and genuine patriotism took care to explain "the manner of the kingdom," that is, the royal rights and privileges, together with the limitations to which they were to be subjected; and in order that the constitution might be ratified with all due solemnity, the charter of this constitutional monarchy was recorded and laid up "before the Lord," that is, deposited in the custody of the priests, along with the most sacred archives of the nation.
1 Samuel 16:12
12. he was ruddy, &c.—JOSEPHUS says that David was ten, while most modern commentators are of the opinion that he must have been fifteen years of age.
1 Chronicles 28:4
4, 5. he hath chosen Solomon—The spirit of David's statement is this:—It was not my ambition, my valor, or my merit that led to the enthronement of myself and family; it was the grace of God which chose the tribe, the family, the person—myself in the first instance, and now Solomon, to whom, as the Lord's anointed, you are all bound to submit. Like that of Christ, of whom he was a type, the appointment of Solomon to the kingdom above all his brethren was frequently pre-intimated (1Ch 17:12; 22:9; 2Sa 7:12-14; 12:24, 25; 1Ki 1:13).