Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) said: My cistern (Hawd) is equal to the distance of a month's journey, its four corners are equal (that is, its length and width are the same), its water is whiter than silver and its fragrance is better than musk. The cups placed on it are as numerous as the stars in the sky. Whoever drinks from it will never feel thirsty again. Abdullah said that Sayyida Asma bint Abi Bakr (may Allah be pleased with her) said that the Messenger of Allah (peace and blessings be upon him) said: I will be at the cistern and I will see who among you comes to me there. And some people will be prevented from coming to me, so I will say: O Lord! These people are from me, from my Ummah. Then it will be said in reply: You do not know what deeds they did after you. By Allah, after you they did not stay for long and turned back on their heels (they turned away from Islam; among them are the Khawarij who separated from Sayyiduna Ali (may Allah be pleased with him) and began to consider Muslims as disbelievers, and also those who did not act upon the will of the Prophet (peace and blessings be upon him) and troubled and martyred his family—Allah forbid). Ibn Abi Mulaykah (the narrator of the hadith) says: O Allah, we seek Your protection from turning back on our heels or from any tribulation in the religion.