I am counted with them that go down into the pit - I am so near to death that I may be reckoned already as among the dead. It is so manifest to others that I must die - that my disease is mortal - that they already speak of me as dead. The word “pit” here means the grave - the same as Sheol in the previous verse. It means properly
(1) a pit,
(2) a cistern, Genesis 37:20,
(3) a prison or dungeon, Isaiah 24:22,
(4) the grave, Psalms 28:1; Psalms 30:4; Isaiah 38:18.
I am as a man that hath no strength - Who has no power to resist disease, no vigor of constitution remaining; who must die.