1)
عن أبي بكر المروذي قال: سألت أبا عبد الله عمن يشتم أبا بكر وعمر وعائشة؟ قال: ما أراه على الإسلام
Translation:
"From Abu Bakr al Marwazee:"I asked Abu Abdullah (imam Ahmad) about (someone who) abused Abu Bakr, Umar, Aisha?. He replied: "I don't see him upon islam".
Source: Abu Bakr Al-Xallal "Sunnan" 2/557, with authentic chain.
2)
عن محمد بن يوسف الفريابي قال: سمعت سفيان ورجل يسأله عن من يشتم أبا بكر وعمر؟ فقال: كافر بالله العظيم
Translation:
"From Muhammad ibn Yusuf al Firyabee: "I heard a man asked Sufyan (As Sauree) about (person which )abused Abu Bakr,and Umar. He replied: "Disbeliever in Great Allah".
Source: Zahabi "Siyar alamoon nubala" 7/253
3)
عن موسى بن هارون قال: سمعت الفريابي ورجل يسأله عمن شتم أبا بكر وعمر؟ قال: كافر...، قال: فيصلى عليه؟ قال: لا، وسألته كيف يصنع به وهو يقول: لا إله إلا الله؟ قال: لا تمسوه بأيديكم ارفعوه بالخشب حتى تواروه في حفرته
Translation:
"From Moosa ibn Kharoon: "I heard a person asking Firyabee (Muhammad ibn Yusoof) about (person) which insulted Abu Bakr and Umar. (Firyabee) replied: "Kaafir". Then person asked: "Should we pray over him (his body)?".
(Firyabee) replied: "No". Man asked: "Wha should we do? He use to say "la ilaha ila llah". Firyabee replied: "Don't touch him with hands, take two sticks and push him into the grave".
Source: "Sunan" Xallal 1/499; "Ibanatul Suğra" s 160.
4)
إذا رأيت الرجل ينتقص أحدا من أصحاب رسول الله - صلى الله عليه وسلم- فاعلم أنه زنديق
Translation:
(Imam Abu Zurah ar-Raze said): "If u will see someone who is disgrasing one from the companions of prophet (sallalahu alayhi wa salam), know that such person is heretic (zindeeq)! ..."
Source: "Al-Kifaya fi İlm Ar-Rivaya", p: 97
5) كل من شتم عثمان أو طلحة أو واحدا من أصحاب رسول الله صلى الله عليه وسلم دجال لا يكتب عنه وعليه لعنة الله والملائكة والناس أجمعين
Translation:
(Yahya ibn Main said): "Whoever will abuse Usman (r.a) or Talha (r.a) or any other companion of prophet (sallalahu alayhi wa salam) is dajjal, and he is not be recorded from. Upon him curse of Allah, angles and each human".
Source: "Tahtheeb at tahtheeb" by Ibn Hajar vol1, #948.
6)
"من شتم أبا بكرالصديق رضي الله عنه فقد ارتدَّ عن دينه وأباح دمه".
Translation:
(Imam Auzayee (d 157 h) said) "Whoever will abuse Abu Bakr, apostated from his religion, and his blood is permitted".
Source: "Sharh al Ibanatool Sugra" by ibn Batta
7)
واجتمعت الأمة على تكفير الإمامية لأنهم يعتقدون تضليل الصحابة وينكرون إجماعهم، وينسبونهم إلى ما لا يليق بهم
Translation:
Abu Sayeed Abdal Kareem ibn Mohammad ibn Mansoor At-Tameeme As-Samanee (d 562 h) said: "And nation is agreed upon takfeer of imamiya. Because they believe that companions been deluded, and they use to reject agreed opinion (of companions) and they attribute to (companions) things which doesn't suit to them".
Source: Samanee "Ansaab" 6/341.
وأما أهل الأهواء الجارودية الهاشمية والجهمية، والإمامية الذين أكفروا خيار الصحابة.. فإنا نكفرهم، ولا تجوز الصلاة عليهم عندنا ولا الصلاة خلفهم
Tranlation:
Abu Mansoor Abdal Kaheer ibn Tahhar ibn Muhammad Bagdadee, At-Tamemee Al-Isfarayenee (d 429 h) said: "Regarding people of desire like Jaroodiya, Khashamiya, Jahmeya, and Imamiya, which use to make takfeer upon the best from companions, (we can say) that they are disbelievers in our view. It's not permitted to pray upon them in our view, and neither permitted to pray behind them".
Source: Bagdadee "Al Fark beyna firak" p 357. (Quoted from book by Naseer al Qifaree)
9)
"وأما من سب أحدا من الصحابة فهو فاسق ومبتدع بالإجماع إلا إذا اعتقد أنه مباح كما عليه بعض الشيعة وأصحابهم، أو يترتب عليه ثواب كما هو دأب كلامهم أو اعتقد كفر الصحابة وأهل السنة فإنه كافر بالإجماع"
Translation:
Sheikh Ali ibn Soltan ibn Muhammad, better known like Al-Karee Hanafe (d 1014 h)said: "Whoever will abuse single person from companions is a faseeq and innovator, in accordance to agreed opinion. But if he will think like some shias and their companions that such act is permisseble, or he would expect reward for this act, like they always use to talk about. Or he would think that companions and ahle-sunna are kuffar. Then such person is disbeliever in accordance to agreed upon opinion".
Source:"Shammool awraad fi zamm al rafd" pages 252,254.
Wellcome ya akhil-kareem!
10)
من شتم أصحاب رسول الله -صلى الله عليه وسلم-: فهو كافر وإن صام وصلى وزعم أنه من المسلمين
Translation:
Bishr ibn Hareeth ibn AbduRahman ibn Ata said: "The one who curse companions of prophet (sallalahu alayhi wa ala alaihi wa salam) is kaafir, even if he pray, fast and say that he's moslem".
Source: Sharh ibn Batta.