And it came to pass, when they were come, that he looked on Eliab, and said, Surely the LORD'S {d} anointed is before him.

(d) Thinking that Eliab had been appointed by God to be made king.

Wesley's Notes

16:6 Before him - That is, in this place where God is now present. For it is observable, that not only the sacrifice is said to be offered, but even the feast upon the remainders of it is said, to be eaten before the Lord, Deut 12:7, that is, before or near his altar, where God was present in a special manner. This I take to be the person I am sent to anoint: wherein yet be was mistaken, as other prophets sometimes were, when they hastily spake their own thoughts, before they had consulted God.

King James Translators' Notes

Eliab: called Elihu

Jamieson-Fausset-Brown Bible Commentary

6-10. Samuel said, Surely the Lord's anointed is before him-Here Samuel, in consequence of taking his impressions from the external appearance, falls into the same error as formerly (1Sa 10:24).

Matthew Henry's Concise Commentary

16:6-13 It was strange that Samuel, who had been so disappointed in Saul, whose countenance and stature recommended him, should judge of another man by that rule. We can tell how men look, but God can tell what they are. He judges of men by the heart. We often form a mistaken judgment of characters; but the Lord values only the faith, fear, and love, which are planted in the heart, beyond human discernment. And God does not favour our children according to our fond partiality, but often most honours and blesses those who have been least regarded. David at length was pitched upon. He was the youngest of the sons of Jesse; his name signifies Beloved; he was a type of God's beloved Son. It should seem, David was least set by of all the sons of Jesse. But the Spirit of the Lord came upon David from that day forward. His anointing was not an empty ceremony, a Divine power went with that instituted sign; he found himself advanced in wisdom and courage, with all the qualifications of a prince, though not advanced in his outward circumstances. This would satisfy him that his election was of God. The best evidence of our being predestinated to the kingdom of glory, is, our being sealed with the Spirit of promise, and experience of a work of grace in our hearts.