It is narrated from Sayyiduna Abu Sa'id Khudri, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: "If Allah Almighty were to withhold rain from my Ummah for ten years and then send down rain, a group from my Ummah would become disbelievers because of it, and they would say: 'This is because of the star Majdah.'"
It is said that Majdah is a star which is called Dabaran. (In the era of ignorance, the belief of the Arabs was that rain falls because of Majdah.)