Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates this saying of the Prophet (peace and blessings be upon him): "Whoever leads people in prayer should fear Allah Almighty and should know that he is a guarantor, and he will be held to account for what he has guaranteed. If he does well, he will receive a reward, as much as the reward of those who prayed behind him, without anything being reduced from their reward; and any shortcoming (on the part of the imam), its burden will be upon him (the imam) alone."
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains Mu'arik bin Abbad, whom Ahmad, al-Bukhari (may Allah have mercy on him), Abu Zur'ah and al-Daraqutni (may Allah have mercy on him) declared da'if (weak). Ibn Hibban mentioned him in his book al-Thiqat.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2335
Hadith Gradingمحدثین:إسنادہ ضعیف
Hadith Takhrij«أخرجه المعجم الأوسط للطبراني برقم: 7751»
Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) narrates that the Prophet (peace and blessings be upon him) said: "The imam is a guarantor, so whatever he does, you do the same."
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains Musa bin Shaybah, who is from the descendants of Sayyiduna Ka'b bin Malik (may Allah be pleased with him). Ahmad declared him da'if (weak), and Abu Hatim called him thiqah (trustworthy). Ibn Hibban also mentioned him in his book al-Thiqat. I say: Hadiths have already passed in the chapter on the adhan concerning this saying of the Prophet (peace and blessings be upon him): "The imam is a guarantor, and the mu'adhdhin is entrusted."
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2336
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«أخرجه مسند أحمد برقم: 7129، وأخرجه المعجم الكبير للطبراني برقم: 8097، وأخرجه المعجم الأوسط للطبراني برقم: 3569»