Psalms 115:17

Praise not. The dead are in a state of unconscious sleep and are oblivious of anything that is going on in earth or heaven. “The dead know not any thing” (Eccl. 9:5; cf. Ps. 146:4; 1 Thess. 4:13–17). The popular concept that the souls of men depart at death and exist in a state of conscious bliss in the realms above is denied by the psalmist’s statement. One would naturally expect that such redeemed souls would be eager to ascribe praise to Him who wrought such marvelous redemption for them. But the dead sleep unconsciously in their graves and evince no praise.