Mu'jam Kabir Tabarani 304 — Ibn Mas'ud was owed some money by Sa'd, so

Qays said: Ibn Mas'ud (may Allah be pleased with him) was owed some money by Sa'd (may Allah be pleased with him), so Ibn Mas'ud said: Pay back the money that you owe. Sa'd said: "Woe to you! What have I to do with you, and what have you to do with me?" He said: Pay back the money that you owe. So Sa'd said: "By Allah! I think you will certainly meet with harm from me. Are you anything but Ibn Mas'ud, a slave from Banu Hudhayl?" He said: Yes, by Allah! I am Ibn Mas'ud, and you are Ibn Hamnah. Then Hashim bin Utbah said to them both: You are both Companions of the Messenger of Allah (peace and blessings be upon him), and the people are watching you. So Sa'd threw away a stick that was in his hand, then raised his hand and said: "O Lord of the heavens!" Abdullah (bin Mas'ud) said to him: Say something else, and do not curse. So he fell silent, then Sa'd said: "Listen, by Allah! Were it not for the fear of Allah, I would have made a supplication against you that would not miss you."