It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever gives the call to prayer for the five prayers and leads them (in prayer) out of faith and seeking reward, his past sins will be forgiven."
I do not know it except through the narration of Ibrahim bin Rustam from Hammad.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2039
Hadith Gradingمحدثین:ضعيف
Hadith Takhrij«ضعيف۔ أخرجه الاصبهاني في الترغيب والترهيب 1/40»