Sayyiduna Uthman Ghani (may Allah be pleased with him) says that I had a great desire that I wish I had asked before the passing of the Prophet (peace and blessings be upon him) what can save us from the whispers and thoughts that Satan puts into our hearts? Upon hearing this, Sayyiduna Abu Bakr Siddiq (may Allah be pleased with him) said that I have already asked this question to the Prophet (peace and blessings be upon him), to which the Prophet (peace and blessings be upon him) replied that you should continue to recite the same statement of Tawheed that I presented before my uncle, but he refused to say that statement. The abundance of this statement alone will save you from those whispers.