Commentaries
2:27-36 Those who allow their children in any evil way, and do not use their authority to restrain and punish them, in effect honour them more than God. Let Eli's example excite parents earnestly to strive against the beginnings of wickedness, and to train up their children in the nurture and admonition of the Lord. In the midst of the sentence against the house of Eli, mercy is promised to Israel. God's work shall never fall to the ground for want of hands to carry it on. Christ is that merciful and faithful High Priest, whom God raised up when the Levitical priesthood was thrown off, who in all things did his Father's mind, and for whom God will build a sure house, build it on a rock, so that hell cannot prevail against it.
31. I will cut off thine arm, and the arm of thy father's house—By the withdrawal of the high priesthood from Eleazar, the elder of Aaron's two sons (after Nadab and Abihu were destroyed, [Nu 3:4]), that dignity had been conferred on the family of Ithamar, to which Eli belonged, and now that his descendants had forfeited the honor, it was to be taken from them and restored to the elder branch.