But though we quickly decay and perish, yet God's mercy to us doth not die with us; but as it was from eternity exercised in gracious purposes, so it will be continued unto eternity in that future and endless life. Upon them that fear him: see before on Psalms 103:11. His righteousness; either his faithfulness, or (that this branch may answer to the former) his mercy or benignity; this word being frequently used in both these senses, as hath been proved before. But it is here called righteousness, to intimate that God's kindness to the posterity of his people is not only an act of his goodness, but also a discharge of his obligation under which he put himself to them, as elsewhere, so Exodus 20:6, to which this place seems to relate. Hence it is called mercy to Abraham and truth to Jacob, Micah 7:20.
Related Commentaries of Psalms 103:17
Psalms 103:17
17 But the mercy of the LORD is from everlasting to everlasting upon them that fear him, and his righteousness unto children's children;