Narrated Uthman ibn Affan:: Yazid al-Farisi said: I heard Ibn Abbas say: I asked Uthman ibn Affan: What moved you to put the (Surah) al-Baraah which belongs to the mi'in (surahs) (containing one hundred verses) and the (Surah) al-Anfal which belongs to the mathani (Surahs) in the category of as-sab'u at-tiwal (the first long surah or chapters of the Quran), and you did not write "In the name of Allah, the Compassionate, the Merciful" between them? Uthman replied: When the verses of the Quran were revealed to the Prophet ﷺ, he called someone to write them down for him and said to him: Put this verse in the surah in which such and such has been mentioned; and when one or two verses were revealed, he used to say similarly (regarding them). (Surah) al-Anfal is the first surah that was revealed at Madina, and (Surah) al-Baraah was revealed last in the Quran, and its contents were similar to those of al-Anfal. I, therefore, thought that it was a part of al-Anfal. Hence I put them in the category of as-sab'u at-tiwal (the seven lengthy surahs), and I did not write "In the name of Allah, the Compassionate, the Merciful" between them.
Hadith Referenceسنن ابي داود / أبواب تفريع استفتاح الصلاة / 786
Hadith Gradingالألبانی:ضعيف | زبیر علی زئی:حسن, مشكوة المصابيح (2222), أخرجه الترمذي (3086 وسنده حسن) يزيد الفارسي و ثقه ابن حبان و الترمذي وغيرهما فھو حسن الحديث و أخطأ من ضعّف ھذا الحديث
Hadith Takhrij« سنن الترمذی/تفسیر القرآن 10 (3086)، (تحفة الأشراف: 9819)، وقد أخرجہ: مسند احمد (1/57، 69) (ضعیف) » (یزید الفارسی لین الحدیث ہیں)
1؎: «مئین» refers to those surahs which contain more than one hundred (100) verses.
2؎: «مثانی» are those surahs which are shorter than «مئین».
3؎: By «سبع طوال» is meant Surah al-Baqarah, Aal-e-Imran, an-Nisa, al-Ma'idah, al-An'am, and al-A'raf, and there is a difference of opinion regarding the seventh: one view is that it is al-Anfal and Bara'ah (both together), and another view is that it is Surah Yunus.
´Narrated Ibn 'Abbas:` "I said to 'Uthman bin 'Affan: 'What was your reasoning with Al-Anfal - while it is from the Muthani (Surah with less than one-hundred Ayat), and Bara'ah while it is from the Mi'in (Surah with about one-hundred Ayat), then you put them together, without writing the line Bismillahir-Rahmanir-Rahim between them, and you placed them with the seven long (Surah) - why did you do that?' So 'Uthman said: 'A long time might pass upon the Messenger of Allah (ﷺ) without anything being revealed to him, and then sometimes a Surah with numerous (Ayat) might be revealed. So when something was revealed, he would call for someone who could write, and say: "Put these Ayat in the Surah which mentions this and that in it." When an Ayah was revealed, he would say: "Put this Ayah in the Surah which mentions this and that in it." Now Al-Anfal was among the first of those revealed in Al-Madinah, and Bara'ah among the last of those revealed of the Qur'an, and its narrations (those of Bara'ah) resembled its narrations (those of Al-Anfal), so we thought that it was part of it. Then the Messenger of Allah (ﷺ) died, and it was not made clear to us whether it was part of it. So it is for this reason that we put them together without writing Bismillahir-Rahmanir-Rahim between them, and we put that with the seven long (Surahs).'"
Shaykh Dr. Abdur Rahman Freywai
Commentary: Note: (In the chain of narration, Yazid al-Farisi al-Basri is a maqbul (acceptable) narrator, meaning he is considered reliable when there is corroboration, and here there is no corroboration; therefore, he is considered weak in hadith (lin al-hadith).)
Source: Sunan al-Tirmidhi – Majlis ‘Ilmi Dar al-Da‘wah, New Delhi Edition, Page: 3086