Al-Bukhari (6643) narrated from Abu Sa’id that a man heard another man reciting Qul Huwallahu Ahad and repeating it. The next morning he came to the Messenger of Allah (peace and blessings of Allah be upon him) and told him about that. The man thought that it was too little, but the Messenger of Allah (peace and blessings of Allah be upon him) said: “By the One in Whose Hand is my soul, it is equivalent to one-third of the Quran.”
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