[1/-] Ali from his father from Ibn Abi Najran from Asim b. Humayd from Mansur b. Hazim who said: I said to Abi Abdillah عليه السلام: what is my condition – I ask you about a matter so you answer me in it with a certain answer, then someone other than me comes to you and you answer him with a different answer? He said: we answer the people with deletion [in-short] and [at other times] with addition [in-depth].  I said: so inform me about the companions of the messenger of Allah صلى الله عليه واله – were they truthful about Muhammad or did they lie? He said: they were truthful, I said: so what was the matter with them that they differed? He said: don’t you know that a man used to come to the messenger of Allah صلى الله عليه واله and ask him about a thing so he answers him in it with an answer, then he answers after that with that which abrogates the former answer, so the narrations abrogated one another.

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[-/1] الكافي: علي، عن أبيه، عن ابن أبي نجران، عن ابن حميد، عن ابن حازم، قال: قلت لأبي عبد الله عليه السلام: ما بالي أسألك عن المسألة فتجيبني فيها بالجواب ثم يجيئك غيري فتجيبه فيها بجواب آخر؟ فقال: إنا نجيب الناس على الزيادة والنقصان. قال: قلت: فأخبرني عن أصحاب رسول الله صلى الله عليه واله صدقوا على محمد صلى الله عليه واله أم كذبوا ؟ قال: بل صدقوا قلت: فما بالهم اختلفوا فقال: أما تعلم أن الرجل كان يأتي رسول الله صلى الله عليه واله فيسأله عن المسألة فيجيبه فيها بالجواب، ثم يجيبه بعد ذلك بما ينسخ ذلك الجواب فنسخت الأحاديث بعضها بعضا