Abu Muhammed, a relative of Imaam Shaafi‘ee (rahimahullah), mentions that he heard statements regarding Imaam Shaafi‘ee (rahimahullah) from both Hasan bin Muhammed bin Sabbaah Al-Za’faraani (rahimahullah) and Abul Waleed ibnu Abil Jaarood (rahimahullah).
One of them mentioned, “I heard Muhammed bin Idrees Shaafi‘ee (rahimahullah) take an oath and say, ‘I never debated with any person except that it was in order to wish well for him.’”
The other mentioned, “I heard Muhammed bin Idrees Shaafi‘ee (rahimahullah) say, ‘By Allah! I never debated with any person and liked that he would err.’”
(Aadaab-us-Shaafi‘ee wa Manaaqibuhu pg. 91-92)