عن ابن جرير بن عبد الله عن أبيه قال قال رسول الله صلى الله عليه وسلم من سن سنة خير فاتبع عليها فله أجره ومثل أجور من اتبعه غير منقوص من أجورهم شيئا ومن سن سنة شر فاتبع عليها كان عليه وزره ومثل أوزار من اتبعه غير منقوص من أوزارهم شيئا (سنن الترمذي #2675)

Hazrat Jareer bin ‘Abdillah (radhiyallahu ‘anhu) reports that Rasulullah (sallallahu ‘alaihi wasallam) said, “Whoever initiates a good practice and he is then followed by others in this practice, then he will receive his own reward (for practicing on this action) as well as the rewards of those who followed him, without their rewards being decreased in the least. And whoever initiates an evil practice and is then followed by others in this practice, then he will bear his own sin (for committing this evil) as well as the sin of those who followed him, without their burdens (of sin) being decreased in the least.”