Psalms 88:12 - Matthew Poole's English Annotations on the Holy Bible

In the dark; in the grave, which is called the land of darkness, Job 10:21,22. In the land of forgetfulness; in the grave; so called, either, first, Actively, because there men forget and neglect all the concerns of this life, being indeed but dead carcasses without any sense or remembrance. Or rather, secondly, Passively, because there men are forgotten not only by men, as is noted, Job 24:20 Psalms 31:12, but by God himself, as he complained, Psalms 88:5.