Eugène Fromentin, French, 1820-1876 – Arabian Shepherd (Shepherd: High Plateau of Kabylia) Philadelphia Museum of Art

The picture has something of this: people, mammal, two, cavalry, woman, herder, man, wear, rock, seated, outdoors, recreation, veil, water.
Perhaps it’s a painting of a man riding on the back of a white horse in a mountainous area with sheep in the foreground and a mountain range in the background.