It was narrated from Mundhir bin Jarir that his father said: "The Messenger of Allah said: 'Whoever introduces a good practice that is followed, he will receive its reward and a reward equivalent to that of those who follow it, without that detracting from their reward in their slightest. And whoever introduces a bad practice that is followed, he will receive its sin and a burden of sin equivalent to that of those who follow it, without that detracting from their burden in the slightest.'"

لا تلتقي أسانيد هذه الأحاديث عند راوٍ واحد، وهي على ١٠ رواة في أعلاها.