In 1596 Rasas appeared in the Ottomantax registers under the name of Irsas (diz nazd Kafr), being part of the nahiya of Bani Nasiyya in the Qada of Hauran. It had an entirely Muslim population consisting of 20 households and 10 bachelors. They paid a fixed tax-rate of 40% on agricultural products, including wheat, barley, summer crops, goats and bee-hives; a total of 3,880 akçe. Part of the income (8 out of 24 parts) went to a Waqf.[3]