Maliks Muwatta Book 15, Hadith Number 41.

Section : Making Dua.

Yahya related to me from Malik that he had heard that the Messenger of Allah, may Allah bless him and grant him peace, said, “No one calls to guidance without having the same reward as those who follow him without diminishing their rewards at all. And no one calls to error without having the same burdens as they do without diminishing their burdens at all.”