It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that he heard the Prophet (peace and blessings be upon him) saying: "Let not the Bedouins overpower you regarding the name of your prayer. Remember! Its name is 'Isha prayer. At that time, they milk their camels (and for this reason, they call the Isha prayer 'Atamah)."