Numa Pompilius and the nymph Egeria Nicolas Poussin (1594-1665)

The picture has something of this: people, water, reclining, recreation, two, tree, man, woman, daylight, outdoors, wear, landscape, river, rock.
Perhaps it’s a painting of a group of people in a wooded area with a man in the foreground and a woman on the other side of the painting.