Ibn Mas'ud (May Allah be pleased with him) said:
The Messenger of Allah (ﷺ) said, "None of my Companions should convey to me anything regarding another because I desire to meet everyone of you with a clean heart."[Abu Dawud and At- Tirmidhi]. (DE)
App reference (DE): Book 18, Hadith 29 (DE)
Arabic/English book reference (DE): Book 18, Hadith 1539 (DE)