Psalms 68:20

“The Lord rewarded me according to my righteousness, etc.] Which, if applied to David, cannot be understood of his own personal righteousness, or of works of righteousness done by him, for these merit nothing at the hand of God; no reward, in strict justice, is due to them, or given to them: a man’s own righteousness is imperfect, and by the law of God is not accounted a righteousness; and it is unprofitable to God, is no gain to him, and so not rewardable by him; and were it perfect, it is but man’s duty, and what God has a prior right to, and so is not recompensed by him; though it is so far from being pure and perfect, that it is attended with much sin, and is no other than rags, and…”

“He that is our God is the God of salvation - literally, “God is for us a God of salvation.” That is, The God whom we worship is the God from whom salvation comes, and who brings salvation to us. It is not a vain thing that we serve him, for he is the only being who can save us, and he will save us. And unto God the Lord belong the issues from death - The “outgoings” or “escapes” from death. That is, He only can save from death. The Hebrew word means, properly, a going forth, a deliverance; then, a place of going forth as a gate, Ezekiel 48:30; a fountain, Proverbs 4:23. Probably the only idea intended here by the psalmist was, that safety or deliverance from death proceeds solely from God.…”

“Issues - Escapes or deliverances. Psalms 68:21”

“our God: Isa 12:2, Isa 45:17-22; Hos 1:7; Joh 4:22 unto: Psa 118:17, Psa 118:18; Deu 32:39; Sa1 2:6; Joh 5:21, Joh 5:23, Joh 5:28, Joh 5:29, Joh 11:25, Joh 11:26; Heb 2:14, Heb 2:15; Rev 1:18, Rev 20:1 issues: Pro 4:23 Psalms 68:21”