Thy rival… A priest of another race. This was partly fulfilled, when
Abiathar, of the race of Heli, was removed from the priesthood, and
Sadoc, who was of another line, was substituted in his place. But it was
more fully accomplished in the New Testament, when the priesthood of
Aaron gave place to that of Christ.

2:33. However, I will not altogether take away a man of thee from my altar: but that thy eyes may faint, and thy soul be spent: and a great part of thy house shall die, when they come to man's estate.

2:34. And this shall be a sign to thee, that shall come upon thy two sons, Ophni and Phinees: in one day they shall both of them die.

2:35. And I will raise me up a faithful priest, who shall do according to my heart, and my soul and I will build him a faithful house, and he shall walk all days before my anointed.

2:36. And it shall come to pass, that whosoever shall remain in thy house shall come that he may be prayed for, and shall offer a piece of silver, and a roll of bread, and shall say: Put me, I beseech thee, to somewhat of the priestly office, that I may eat a morsel of bread.

1 Kings Chapter 3

Samuel is four times called by the Lord: who revealeth to him the evil that shall fall on Heli, and his house.

3:1. Now the child Samuel ministered to the Lord before Heli, and the word of the Lord was precious in those days, there was no manifest vision.

Precious… That is, rare.

3:2. And it came to pass one day when Heli lay in his place, and his eyes were grown dim, that he could not see: