It was narrated that 'Abdullah bin Mas'ood (رضي الله عنه) said:

The Messenger of Allah (ﷺ) said to his Companions: "I do not want anyone to tell me anything (negative) about any of my Companions, for I like to come out to you with no ill feeling in my heart (towards anyone)." Some wealth came to the Messenger of Allah (ﷺ) and he shared it out. Then I passed by two men, one of whom was saying to the other. By Allah, in the way he divided it Muhammad was not seeking the Countenance of Allah or the Hereafter. I paused so that I could hear what they were saying, then I went to the Messenger of Allah (ﷺ) and said: O Messenger of Allah, you said to us, "I do not want anyone to tell me anything (negative) about any of my Companions,” but I passed by So-and-so and So-and-so, and they were saying such and such. The face of the Messenger of Allah (ﷺ) turned red and he was very distressed. Then he said: “Leave us alone. Moosa was annoyed with more than this and he was patient.”