Sahih Bukhari
Prayers (Salat)
Volume: 001 / Book Number: 008 / Hadith Number: 444
Narrated Hassan bin Thabit Al-Ansari:
I asked Abu Huraira "By Allah! Tell me the truth whether you heard the Prophet saying, 'O Hassan! Reply on behalf of Allah's Apostle. O Allah! Help him with the Holy Spirit." Abu Huraira said, "Yes . "