Then Job says: "If I wait the grave is mine house: I have made my bed in the darkness".

"Our rest together is in the dust." (Job 17:13,16) Thus he pictures the grave as a condition of darkness, where there is no knowledge, no wisdom or device.

Again he said: "A man's sons come to honor, and he knoweth it not; and they are brought low, but he perceiveth it not of them".

(Job 14:21) Why?
Because those who are in hell, in the tomb, in the grave, in the condition of death, have no knowledge of anything.

They are out of existence, waiting for the resurrection.
[86]Jacob's beloved son Joseph was sold into Egypt by his brethren.
Joseph's coat was dipped in the blood of an animal and brought to Jacob, and it was told Jacob the father that his son Joseph was dead.