Yahya bin 'Ammara يحيى بن عمارة بن أبي حسن الأنصاري · Model Behavior of the Prophet (Kitab Al-Sunnah)

I said to ‘All (Allah be pleased with him) : Tell me about this march of yours. Is this an order that the Messenger of Allah (May peace be upon him) had given you, or is this your opinion that you have? He said: The Messenger of Allah (May peace be upon him) did not give me any order; but this is an opinion that I have.