Per Our Hideout (Location)
A small bandit encampment in the ruins of Saqqara Nome. You'll pass through here ever-so-briefly during the side quest Taimhotep's Song, but won't really have time to linger.
The camp looks formidable, but the ruins keep the bandits from seeing each other, making them relatively easy prey. The treasure is even easier prey- get close to it just by sneaking along the eastern wall.
Drop down by the treasure and take out the one or two guards that are in your way.
The treasure itself is sitting quietly under the overhang.
Claim it to complete the location.