The Children of Shama have strict hospitality rules that require them to offer sustenance and shelter to anyone lost in the desert. On the whole, this works out well, since it gives some assurance that one will be rescued if one finds oneself alone. It also means that, should a Child of Shama set out across the desert, they will be able to intercept other tribes and know that they will be offered water and at least minimal provisions.
But the owner of this tent doesn’t know what they’re doing. They’ve made the mistake of traveling in the day and sleeping at night. The tent owner awoke to find these two travelers approaching with curiosity, preparing, as the sun rises, to make camp for the day and sleep through the high heat.
They are concerned that this foolish person will be a waste of their water, their coffee, their meager bread, and their lamb jerky provisions. They’d be happy to help someone across the desert, fulfilling their duty. They’re less sanguine about giving it to someone who is clearly just going to die of exposure in the next day.