It is narrated from Sayyiduna Zayd bin Thabit (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "May Allah keep radiant the person who heard something from us, memorised it and then conveyed it onward, for often the bearer of understanding is not himself one who understands."
"There are three things over which the heart of a Muslim never harbours betrayal (or rancour): making one's deeds sincerely for Allah, sincere goodwill towards the rulers, and holding fast to the community, for their supplication encompasses those who are behind them."
Hadith Referenceالمعجم الكبير للطبراني / باب الزاي / 4871