We have seen in Psalm 69 that it is psalm about both David and Jesus, and that there is both a symbol / type (David), and a fulfillment (Jesus), and the subjects are intertwined. It says of both that the prayer to the Lord by them was at an acceptable time. Have you done that? Have you sought the Lord at an acceptable time? Both men had to wait a while before receiving the kingdom, and we can see there is merit to waiting.

Don’t let me be overwhelmed, they say,

“14 Deliver me out of the mire, and don’t let me sink.
Let me be delivered from those who hate me, and out of the deep waters.
15 Don’t let the flood waters overwhelm me,
Neither let the deep swallow me up.
Don’t let the pit shut its mouth on me. Psa 69:14-15.

And “the pit,” what is that talking about?

The “pit” or something that you sink into and it swallows you, is a subject of many Scriptures.

“He keeps back his soul from the pit,
And his life from perishing by the sword.”
Job 33:18

It is clearly talking about death here. Again,

“Yes, his soul draws near to the pit,
And his life to the destroyers.”
Job 33:22

The same word above translated as a “pit” is in the WEB translated as “corruption,” in Job 17

“If I have said to corruption, ‘You are my father;’
To the worm, ‘My mother,’ and ‘my sister;’”
Job 17:14

Clearly it is talking about the death of our earthly body and its decay. Then there are passages which clearly associate “the pit”with Sheol (Hebrew) / Hades (Greek), that is to say the place of the dead. For instance in Psalm 30.

“Yahweh, you have brought up my soul from Sheol.
You have kept me alive, that I should not go down to the pit.”
Psa 30:3

Psalm 30 is also a psalm of David and what is asked for in Psa 69:15 is viewed as accomplished here in Psa 30:3. Also here a more regular word for a pit is used, bor meaning a pit, or a cistern for collecting water. But wait! If Psalm 30 is about David then it says David did NOT go down to the pit!

But Peter says David did die!

“Brothers, I may tell you freely of the patriarch David, that he both died and was buried, and his tomb is with us to this day.”
Acts 2:29

Of course also the Old Testament records David’s death. So what is going on? Ah! Perhaps another Psalm in which David speaks in the first person of the Christ. In English we talk about “the pit of hell,” and there are some associations there.

“The wicked shall be turned back to Sheol,
Even all the nations that forget God.”
Psa 9:17

Clearly in Psalm 69 David and the Christ and the
righteous are in danger of death and the pit.

They are earnestly pleading for deliverance, even though Psalm 30 clearly says the Christ (!!??) is saved from death!

Scriptures are from the World English Bible (WEB), a copyright free revision
of the original ASV American Standard Version 1901