On the Banks of the Nile, Upper Egypt John Frederick Lewis (1804-1876)

The picture has something of this: mammal, camel, livestock, desert, herder, cavalry, cattle, seated, animal, outdoors, farm, two, nature, sky, people, farming, grass.
Perhaps it’s a painting of two camels standing next to each other near a body of water with ducks in the water and people on the other side of the water.