Psalms 88:6

Thou hast laid me God is treating him as though he were actually dead. The same word is used in the same connexion in Psalms 49:14.

in the lowest pit The nether world in the depths of the earth. Cp. Psalms 86:13; Psalms 63:9; Lamentations 3:55. The Targum explains it allegorically of the Exile. "Thou hast placed me in exile which is like the nether pit." in darkness R.V. in dark places. So Sheol is described in Psalms 143:3; Lamentations 3:6. Cp. Job 10:21-22.

in the deeps A word generally used of the depths of the sea: here metaphorically of the depths of misery (Psalms 69:15; cp. Lamentations 3:54), or as another synonym for Sheol, which was supposed to be situated below the sea. Cp. Psalms 71:20; Job 26:5.

The LXX and Syr. however read -shadow of death" or -deep gloom" (Psalms 44:19, note). This reading only implies a transposition of the consonants in the Heb. text, and is supported by the parallel passage in Job 10:21-22, which seems to be in the Psalmist's mind.