At this specific timestamp, and Negan are inside an old church where they have taken shelter with a severely injured Alden . Alden, having been slashed in the stomach by a Reaper earlier in the episode, realizes he is "dead weight" and is slowing the group down.
While Maggie's group struggles, back at Alexandria, Carol , Rosita , Magna , and Kelly manage to retrieve escaped horses to provide food for the community. The Walking Dead S11E0343:20 Min
Ultimately, Maggie leaves Alden with a small supply of food and a knife, promising to return for him once the mission is complete. Key Context for the Episode At this specific timestamp, and Negan are inside