أو صاع من تمر أو زبيب أو شعير
Translation: Or one saʿ of dates, raisins, or barley.
The three other named foods are dates, raisins, and barley. Each requires one full saʿ; wheat is distinguished by its half-saʿ quantity.
The source names four foods in total: wheat, dates, raisins and barley. Keep both the list and the difference in quantities intact.