رضا الناس غاية لا تدرك

Etymology
Ibn Abī-l-Ḥadīd attrtibutes it to ʿAlī in his book شرح نهج البلاغة. It literally means "People's acceptance is a goal that cannot be reached".

Proverb

 * 1) It is impossible to make a decision that is accepted by every single person; pleasing and appeasing everyone is a goal that cannot be reached.