The volunteers are taught to begin at the head, washing the face before proceeding to the neck and right shoulder. The right side is to be washed before the left side, the front before the back. There are prayers to say. Small talk is forbidden.

The Jewish protocol for tending to the dead governs almost every interaction between the living and the deceased from the moment of death until burial. The ritual, which has been part of religious law for two millenniums, mandates the protection of the physical and spiritual remains.

But for many decades, most Jews in the United States have lost touch with those protocols — if they have ever heard of them — in favor of conventional funeral home services that replace volunteers with professionals who, by their nature, skip the more metaphysical and personal elements of the process.

Now, a movement to restore lost tradition has motivated a new generation of Jewish volunteers to learn a set of skills that was common knowledge for many of their great-grandparents: the rituals of bathing, dressing and watching over the bodies of neighbors and friends who have died.