Takhrij Hadith 756: "I was with my father…"

I was with my father in the presence of the Prophet, peace and blessings be upon him, and he said: “There will be twelve custodians for this nation, and those who forsake them will not harm them”. Then the Messenger of Allah, peace and blessings be upon him, whispered a word that I could not hear, so I said to my father: “What was the word that the Prophet, peace and blessings be upon him, whispered?” He said: “All of them are from Quraysh”.