Psalms 30:9

“What profit [is there] in my blood? etc.] Should that be shed, and he die by the hands of his enemies, through divine permission: death is not profitable to a man’s self by way of merit; it does not atone for sin, satisfy justice, and merit heaven; even the death of martyrs, and of such who shed their blood, died in the cause of Christ, and for his sake, is not meritorious; it does not profit in such sense: there is profit in no blood but in the blood of Christ, by which peace is made, pardon procured, and redemption obtained. Indeed death is consequentially profitable to good men; it is an outlet of all sorrows and afflictions, and the inlet of joy and happiness; it is the saints’ passage…”

“What proof is there in my blood - That is, What profit or advantage would there be to thee if I should die? What would be “gained” by it? The argument which the psalmist urges is that he could better serve God by his life than by his death; that his death, by removing him from the earth, would prevent his rendering the service which he might by his life. The same argument is presented also in Psalms 6:5 (see the notes at that verse), and is found again in Psalms 88:10-12, and in the hymn of Hezekiah, Isaiah 38:18-19. See the notes at that passage. The prayer used here is to be understood, not as a prayer at the time of the composition of the psalm, but as that which the psalmist employed at…”

“Profit - What wilt thou gain by it? The dust - Shall they that are dead celebrate thy goodness in the land of the living? Or, shall my dust praise thee? Psalms 30:11”

“What: Psa 6:5, Psa 88:10-12, Psa 115:17, Psa 115:18, Psa 118:17; Ecc 9:10; Isa 38:18 Psalms 30:10”