But now thy kingdom shall not continue
That is, in his family, nor in his tribe, but be removed to another:
the Lord hath sought him a man after his own
who was David; though as yet Samuel knew him not, he knew by divine revelation that there was another one chosen, to whom the kingdom would be given; a man every way agreeable to the will of God, and who would fulfil his will, though he knew not particularly who he was:
and the Lord hath commanded him to be captain over his
that is, had appointed him to be king over Israel. God's decrees have the force of a law in them, and must be fulfilled; and cannot be resisted so as to be frustrated:
because thou hast not kept that which the Lord hath
it matters not whether the thing commanded is greater or less, it is disobedience to the command that is the sin, and is resented: this might seem a small thing, since to offer the sacrifice was not criminal; but doing it before the time, a little before it should have been done, not waiting long enough for the prophet; yet it being against the command of God, or in neglect of it, it was sinful, and severely chastised; and the rather, that it might be an example to all succeeding kings how they offended, or broke the least of God's commandments; and this being the first king of Israel, he was made an example of to the rest.