"“I said In the cutting off of my days, I shall go to the gates of the grave: I am deprived of the residue of my years. PK 343.1"
"I said in the cutting off of my days, I shall go to the gates of the grave: I am deprived of the residue of my years."
This is a direct quote from Isaiah 38:10.
"“Mine age is departed, And is removed from me as a shepherd's tent: PK 343.3"
"Mine age is departed, and is removed from me as a shepherd’s tent: I have cut off like a weaver my life: he will cut me off with pining sickness: from day even to night wilt thou make an end of me."
EGW is directly quoting Isaiah 38:12.
"“O Lord, by these things men live, And in all these things is the life of my spirit: So wilt Thou recover me, and make me to live. PK 343.8"
"O Lord, by these things men live, and in all these things is the life of my spirit: so wilt thou recover me, and make me to live."
This is a direct quote from Isaiah 38:16.
"“Behold, for peace I had great bitterness: But Thou hast in love to my soul delivered it from the pit of corruption: For Thou hast cast all my sins behind Thy back. PK 343.9"
"Behold, for peace I had great bitterness: but thou hast in love to my soul delivered it from the pit of corruption: for thou hast cast all my sins behind thy back."
This is a direct quote from Isaiah 38:17.
"“For the grave cannot praise Thee, Death cannot celebrate Thee: They that go down into the pit cannot hope for Thy truth. PK 343.10"
"For in death there is no remembrance of thee: in the grave who shall give thee thanks?"
While not a direct quote, the sentiment and wording are very close to Isaiah 38:18, which is a more direct parallel than Psalms 6:5. The idea of the dead not being able to praise God is the key connection.