the Covenant with David
In this section the psalmist draws put, in detail, the fundamental prophecy by Nathan already mentioned; first, in the promises given to David, Psalms 89:19-27; and second, in those relating to his descendants, Psalms 89:28-37.
David's origin was very humble. His dignity and power were all of God. But our Father never sets a man in any position and fails to supply the gifts needed for it. When He chooses, He anoints, strengthens, and protects. Victory also is granted over the man's enemies, because God's faithfulness and mercy are beside him, Psalms 89:24. The relationship between the soul and God is very intimate; on the one hand you have Psalms 89:26; and on the other Psalms 89:27.
What a precious promise is Psalms 89:28! From this point the psalmist turns to expand the promises to David's line. They may be chastened, but not permanently rejected. In Psalms 89:33 the twin attributes of mercy and faithfulness are again blended as the ground of hope of sinful and unworthy men. God's word, once spoken, is inviolable. He is bound by His oath. Sin cannot alter His promise or the obligations under which He has laid Himself. His unchangeableness is a bed-rock upon which we may build with certitude.