1.
Enjoin what is good and forbid what is evil before the worst amongst you are given authority over you and then when even the best of you make dua against them, their duas will not be accepted.
Uthman ibn Affan
Encourage what is righteous and prohibit what is wrong before the most wicked amongst you are given control over you and then when even the most virtuous of you supplicate against them, they will not be heard.