Abdullah bin Abbas (may Allah be pleased with them both) narrates: There was a difference among the people regarding the sighting of the Ramadan moon. Some said: It will be seen today, others said: It will be seen tomorrow. A Bedouin came to the Prophet (peace be upon him) and said: I have seen the moon. The Prophet (peace be upon him) asked: "Do you bear witness that there is no deity except Allah and that Muhammad (peace be upon him) is the Messenger of Allah?" He replied: Yes! So the Prophet (peace be upon him) ordered Bilal (may Allah be pleased with him) to announce among the people that they should begin fasting. The Prophet (peace be upon him) said: "Begin fasting upon seeing it (the moon) and end fasting upon seeing it. If clouds cover you, then complete the count of thirty days, begin fasting, and do not fast a day before it." This narration is also transmitted with some other chains. Some narrators have also transmitted this narration as a mursal narration.