Psalms 115:12,13 - Joseph Benson’s Commentary on the Old and New Testaments

The Lord hath been mindful of us In our former straits and calamities, and therefore we trust he will still bless us, for he is still the same; his power and goodness are the same, and his promises inviolable; so that we have reason to hope he that hath delivered, and doth deliver, will yet deliver. He will bless the house of Israel That is, he will bless the commonwealth; will bless his people in their civil and secular interests; he will bless the house of Aaron The church, the ministry; he will bless his people, in their religious concerns. He will bless them that fear the Lord Though they be not of the house of Israel, or of the house of Aaron; for it was a truth before Peter perceived it, that, in every nation, he that feareth God and worketh righteousness is accepted of him, Acts 10:34-35. He will bless them, both small and great That is, both young and old; both rich and poor; both high and low. God has blessings in store for them that are pious in early life, and for them that are old disciples; both for those that are poor and mean in the world, and those that are rich and make a figure in it; the greatest need his blessing, and it shall not be denied to the meanest that fear him. Both the weak in grace and the strong shall be blessed of God, the lambs and sheep of his flock.