Ibn Mas'ud (May Allah be pleased with him) used to preach to us once every Thursday. A man said to him: "O Abu 'Abdur-Rahman, we love your talk and we wish that you preach us every day." He said: "There is nothing to prevent me from doing so, but I don't lest I bore you. I follow the same method in preaching to you that Messenger of Allah (ﷺ) adopted in preaching to us for fear of boredom."

[Al-Bukhari and Muslim].