The Messenger of Allah ﷺ was eating with six of his companions when a hungry Arabi came and finished the food in two mouthfuls. The Prophet ﷺ said, "Had he mentioned the name of Allah, it would have sufficed all of you. So when one of you eats, let him mention the name of Allah. If he forgets to mention Allah's name at the beginning, let him say, 'In the name of Allah at its beginning and its end.'"
أن رسول الله ﷺ كان يأكل في ستة من أصحابه فجاء أعرابي جائع فأكل بلقمتين، فقال النبي ﷺ: أما إنه لو ذكر اسم الله لكفاكم، فإذا أكل أحدكم فليذكر اسم الله، فإن نسي أن يسمي الله في أوله، فليقل بسم الله في أوله وآخره.
Reported by Abu Dawud (3767), Tirmidhi (1858), Ahmad (25733) and Ahmad (26089), and Nasai in Amal al-Yawm wal-Layla (281), and Hakim graded it sahih (4/108), all of them through various routes from Hisham bin Abu Abdullah Dastawai, from Budayl bin Maysara, from Abdullah bin Ubayd bin Umayr, from a woman among them called Umm Kulthum, from Ayesha, and he related it.Ibn Majah (3264), Ahmad (25106), and Ibn Hibban (5214) also reported it, all of them from the hadith of Yazid bin Harun, from Hisham Dastawai, from Budayl bin Maysara, from Abdullah bin Ubayd bin Umayr, from Ayesha, and he related it, with no mention of Umm Kulthum in it. The correct version includes mention of her, as the group reported it from Hisham Dastawai.Tirmidhi said, "This is a hasan sahih hadith." Hakim said, "This is a hadith sahih in its isnad." In several manuscripts of Sunan Tirmidhi, after his statement "This is a hasan sahih hadith," it appears that "Umm Kulthum is the daughter of Muhammad bin Abu Bakr Siddiq." This is how Ibn Hajar mentioned it in his commentary on Tuhfat Ashraf (4443/12). This is Tirmidhi's own view, whether it came from his own reasoning or whether Abdullah bin Ubayd bin Umayr named her thus in some of his narrations. However, in Sunan Abu Dawud and elsewhere it appears as "from a woman among them called Umm Kulthum." The pronoun in his statement "among them" refers back to Abdullah bin Umayr, who was from Layth. If she was the woman from Layth, then she is not the daughter of Muhammad bin Abu Bakr Siddiq, since he was from Taym. In either case, no one has provided any authentication of her reliability. But in the first case, it can be said that she narrates from her paternal aunt, and the hadith, as it is said, comes from the Prophet's household. In the second case, Abdullah bin Umayr said nothing about her, so on its face she appears free from serious criticism, and the basis of the hadith is well established.Similar in meaning is what was reported from Umaya bin Makhshi, who was one of the companions of the Messenger of Allah ﷺ. He said, "The Messenger of Allah ﷺ was sitting, and a man was eating, and he did not mention Allah's name until nothing remained of his food except one mouthful. When he raised it to his mouth, he said, 'In the name of Allah, at its beginning and at its end.' The Prophet ﷺ laughed and then said, 'The devil kept eating with him, but when he mentioned the name of Allah, he vomited up what was in his stomach.'"Reported by Abu Dawud (3768), Ahmad (18963), Ibn Sunni in Amal al-Yawm wal-Layla (462), and Hakim (108-109), all of them through the route of Jabir bin Subh, who said, Muthanna bin Abdul-Rahman Khuzai narrated to us, from Umaya bin Makhshi, and he related it.Hakim said, "This is a hadith sahih in its isnad." So he said, but in its isnad is Muthanna bin Abdul-Rahman Khuzai, from whom no one narrated except Jabir bin Subh. Ibn Madini said, "He is unknown (majhul)," though Ibn Hibban mentioned him among his reliable narrators, following his own principle of authenticating anyone in whom no criticism has been found.