It is narrated from Sayyiduna Jarir bin Abdullah al-Bajali (may Allah be pleased with him) that a man from the Ansar came to the Prophet (peace and blessings be upon him) with a pouch of gold that filled the space between his fingers, and said: This is in the path of Allah. Then Sayyiduna Abu Bakr (may Allah be pleased with him) stood up and gave, then Sayyiduna Umar (may Allah be pleased with him) stood up and gave, then the Muhajirun and the Ansar stood up and they too gave. The face of the Messenger of Allah (peace and blessings be upon him) lit up, until we saw that radiance on his (peace and blessings be upon him) cheeks. Then the Prophet (peace and blessings be upon him) said: "Whoever introduces a good practice in Islam, and it is acted upon after him, will have a reward equal to their rewards, without anything being reduced from their rewards. And whoever introduces an evil practice in Islam, and it is acted upon after him, will bear a burden of sin equal to their sins, without anything being reduced from their sins."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 2426