Sayyiduna Qabath bin Ashyam al-Laythi (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "Two men praying in such a way that one of them leads the other is purer in the sight of Allah Almighty than four people praying separately; and four men praying in such a way that one of them leads is purer in the sight of Allah Almighty than eight men praying separately; and eight men praying in such a way that one of them leads is purer in the sight of Allah Almighty than one hundred people praying separately."
Imam al-Bazzar and Imam al-Tabarani in al-Mu'jam al-Kabir recorded it; the narrators of Imam al-Tabarani have been declared trustworthy.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2142