PITTSBURGH — Beth Markovic, an owner of the last kosher grocery store in Pittsburgh, was up to her elbows on Wednesday, making yet another order of sherry mushroom chicken. She has lost track, she said, of how many orders she has made since the devastating massacre here last weekend.

Most of those who were killed at the synagogue on Saturday had been customers at Murray Avenue Kosher at some point. Ms. Markovic’s store, which is less than a half mile from the Tree of Life synagogue, has been a longtime fixture in Pittsburgh, providing food for before and after funerals and for the seven-day shiva period in which mourners come together to comfort the bereaved after burial.

“We’re used to dealing with deaths and funerals, but never anything like this,” Ms. Markovic said. As for the ultimate reason for all the work, she said, in what has become a common sentiment: “I haven’t had time to let it all sink in.”

Yet grief is sinking in slowly across the city, as the public rituals of mourning accumulate day by day. Four people eulogized and buried on Tuesday, three on Wednesday. Every day more solemn shovelfuls of dirt are poured into graves, and another shiva begins. By Saturday night, several of them will be taking place around the city, mostly in and around the neighborhood of Squirrel Hill. People will cry and laugh and swap memories over plates of sherry mushroom chicken.