Sunan At-Tirmidhi

Narrated Simak bin Hard:""I heard 'Abdur-Rahman bin 'Abdullah bin Mas'ud narrating from his father who said: 'I heard the Messenger of Allah (ﷺ) saying: 'May Allah gladden a man who hears something from us, so he conveys it as he heard it. Perhaps the one it is conveyed to is more understanding than the one who heard it