Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
hakim:7087ʿAlī b. Ḥamshādh al-ʿAdl > ʿAlī b. al-Hamdānī > ʿAffān > Hishām al-Dastuwāʾī > Budayl b. Maysarah > ʿUbaydullāh b. ʿUbayd b. ʿUmayr > Um Kulthūm > ʿĀʾishah

From 'Aishah that the Messenger of Allah ﷺ said: "When one of you eats food, then let him say: 'Bismillah.' If he forgets in the beginning, then let him say: 'Bismillah Fi Awwalihi Wa Akhirih (In the Name of Allah in its beginning and its end.)" (Using translation from Tirmidhī 1858)  

الحاكم:٧٠٨٧حَدَّثَنَا عَلِيُّ بْنُ حَمْشَاذٍ الْعَدْلُ ثَنَا عَلِيُّ بْنُ الْهَمْدَانِيِّ ثَنَا عَفَّانُ ثَنَا هِشَامٌ الدَّسْتُوَائِيُّ عَنْ بُدَيْلِ بْنِ مَيْسَرَةَ عَنْ عُبَيْدِ اللَّهِ بْنِ عُبَيْدِ بْنِ عُمَيْرٍ عَنْ أُمِّ كُلْثُومٍ عَنْ عَائِشَةَ قَالَتْ

قَالَ رَسُولُ اللَّهِ ﷺ «إِذَا أَكَلَ أَحَدُكُمْ طَعَامًا فَلْيَقُلْ بِسْمِ اللَّهِ فَإِنْ نَسِيَ فِي أَوَّلِهِ فَلْيَقُلْ بِسْمِ اللَّهِ فِي أَوَّلِهِ وَآخِرِهِ»  

هَذَا حَدِيثٌ صَحِيحُ الْإِسْنَادِ وَلَمْ يُخَرِّجَاهُ صحيح

See similar narrations below:

Collected by Abū Dāwūd, Tirmidhī, Aḥmad, Suyūṭī
abudawud:3767Muʾammal b. Hishām > Ismāʿīl > Hishām / Ibn Abū ʿAbdullāh al-Dastawāʾī > Budayl > ʿAbdullāh b. ʿUbayd > Āmraʾah Minhum Yuqāl Lahā Um Kulthūm > ʿĀʾishah

The Messenger of Allah ﷺ said: When one of you eats, he should mention Allah's name; if he forgets to mention Allah's name at the beginning, he should say: "In the name of Allah at the beginning and at the end of it."  

أبو داود:٣٧٦٧حَدَّثَنَا مُؤَمَّلُ بْنُ هِشَامٍ حَدَّثَنَا إِسْمَاعِيلُ عَنْ هِشَامٍ يَعْنِي ابْنَ أَبِي عَبْدِ اللَّهِ الدَّسْتَوَائِيَّ عَنْ بُدَيْلٍ عَنْ عَبْدِ اللَّهِ بْنِ عُبَيْدٍ عَنِ امْرَأَةٍ مِنْهُمْ يُقَالُ لَهَا أُمُّ كُلْثُومٍ عَنْ عَائِشَةَ ؓ

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِذَا أَكَلَ أَحَدُكُمْ فَلْيَذْكُرِ اسْمَ اللَّهِ تَعَالَى فَإِنْ نَسِيَ أَنْ يَذْكُرَ اسْمَ اللَّهِ تَعَالَى فِي أَوَّلِهِ فَلْيَقُلْ بِسْمِ اللَّهِ أَوَّلَهُ وَآخِرَهُ  

tirmidhi:1858Abū Bakr Muḥammad b. Abān > Wakīʿ > Hishām al-Dastawāʾī > Budayl b. Maysarah al-ʿUqaylī > ʿAbdullāh b. ʿUbayd b. ʿUmayr > Um Kulthūm > ʿĀʾishah

From 'Aishah that the Messenger of Allah ﷺ said: "When one of you eats food, then let him say: 'Bismillah.' If he forgets in the beginning, then let him say: 'Bismillah Fi Awwalihi Wa Akhirih (In the Name of Allah in its beginning and its end.)"  

الترمذي:١٨٥٨حَدَّثَنَا أَبُو بَكْرٍ مُحَمَّدُ بْنُ أَبَانَ حَدَّثَنَا وَكِيعٌ حَدَّثَنَا هِشَامٌ الدَّسْتَوَائِيُّ عَنْ بُدَيْلِ بْنِ مَيْسَرَةَ الْعُقَيْلِيِّ عَنْ عَبْدِ اللَّهِ بْنِ عُبَيْدِ بْنِ عُمَيْرٍ عَنْ أُمِّ كُلْثُومٍ عَنْ عَائِشَةَ قَالَتْ

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا أَكَلَ أَحَدُكُمْ طَعَامًا فَلْيَقُلْ بِسْمِ اللَّهِ فَإِنْ نَسِيَ فِي أَوَّلِهِ فَلْيَقُلْ بِسْمِ اللَّهِ فِي أَوَّلِهِ وَآخِرِهِ  

ahmad:25733Wakīʿ > Hishām Ṣāḥib al-Dastuwāʾī > Budayl b. Maysarah > ʿAbdullāh b. ʿUbayd b. ʿUmayr > Āmraʾah Yuqāl Lahā Um Kulthūm > ʿĀʾishah

From 'Aishah that the Messenger of Allah ﷺ said: "When one of you eats food, then let him say: 'Bismillah.' If he forgets in the beginning, then let him say: 'Bismillah Fi Awwalihi Wa Akhirih (In the Name of Allah in its beginning and its end.)" (Using translation from Tirmidhī 1858)  

أحمد:٢٥٧٣٣حَدَّثَنَا وَكِيعٌ قَالَ حَدَّثَنَا هِشَامٌ صَاحِبُ الدَّسْتُوَائِيِّ عَنْ بُدَيْلِ بْنِ مَيْسَرَةَ عَنْ عَبْدِ اللهِ بْنِ عُبَيْدِ بْنِ عُمَيْرٍ عَنْ امْرَأَةٍ يُقَالُ لَهَا أُمُّ كُلْثُومٍ عَنْ عَائِشَةَ قَالَتْ

قَالَ رَسُولُ اللهِ ﷺ إِذَا أَكَلَ أَحَدُكُمْ طَعَامًا فَلْيَقُلْ بِسْمِ اللهِ فَإِنْ نَسِيَ فِي أَوَّلِهِ فَلْيَقُلْ بِسْمِ اللهِ فِي أَوَّلِهِ وَآخِرِهِ  

suyuti:1356a

The Messenger of Allah ﷺ said: When one of you eats, he should mention Allah's name; if he forgets to mention Allah's name at the beginning, he should say: "In the name of Allah at the beginning and at the end of it." (Using translation from Abū Dāʾūd 3767)   

السيوطي:١٣٥٦a

"إذا أكَلَ أحدُكُمْ طَعامًا فليذْكُرْ اسْمَ الله، فإنْ نَسِيَ أَنْ يَذْكَر اسْمَ الله في أَوَّلَه فْليقُل: بِسْم الله على أوّلَهِ وآخِرِه" .  

[د] أبو داود [ت] الترمذي حسن صحيح، [ك] الحاكم في المستدرك عن عائشة
suyuti:4215a

“The Messenger of Allah ﷺ was eating food with six of his Companions when a Bedouin came and ate it all in two bites. The Messenger of Allah ﷺ said: ‘If he had said Bismillah, it would have sufficed you (all). When any one of you eats food, let him say Bismillah, and if he forgets to say Bismillah at the beginning, let him say Bismillah fi awwalihi wa akhirih (In the Name of Allah at the beginning and at the end).’” (Using translation from Ibn Mājah 3264)   

السيوطي:٤٢١٥a

"أَمَا إنه لو قال: بسم الله لَكَفَاكُمْ؛ فإِذا أَكَل أَحَدُكُم طعامًا فليَقُلْ: بسم اللهِ، فإِن نسى أن يقولَ: بسم الله في أوَّله، فَليَقُلْ بسم اللهِ أولَّهُ وآخرَهُ" .  

[ط] الطيالسي [حم] أحمد [هـ] ابن ماجة [حب] ابن حبّان [ق] البيهقى في السنن عن عائشة