It is authentically reported from the Prophet (peace be upon him) that he said, "If anyone calls others to follow right guidance, his reward will be equivalent to those who follow him (in righteousness) without their reward being diminished in any respect, and if anyone invites others to follow error, the sin, will be equivalent to that of the people who follow him (in sinfulness) without their punishment being diminished in any respect". This meaning is supported by numerous proofs.