Kathir bin Zayd narrated, through al-Muttalib bin Abdullah bin Hantab, from Hakim bin Hizam (may Allah be pleased with him) that he sold his house to Mu'awiyah (may Allah be pleased with him) for sixty thousand. People said: By Allah! Mu'awiyah has cheated you. He said: "I acquired it in the Days of Ignorance for nothing more than a single skin of wine. I call you to witness that this money will be spent in the way of Allah, on the poor, and on freeing slaves. So which of us is the one who has been cheated?"
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3060