Chapter on Ruling of the Forgetful One and the Mistaken One Regarding Fasting

Muhammad ibn Yaqub, from Ali ibn Ibrahim, from his father, from Ibn Abi Umayr, from Muawiya ibn Ammar: I (narrator) said to Abu Abdillah عليه السلام, peace be upon him: “I order the slave-girl to look whether dawn has risen or not, and she says: ‘It has not risen, so I eat.’ Then I look and find that it had already risen when she looked.” Imam عليه السلام said: “You complete your day and make it up (qada). Indeed, had you been the one who looked, there would have been no making it up upon you.”