Imam Ja‘far al-Ṣadiq (as): The people of every land cannot be without three [types of people] to whom they rush for the affairs of their life in this world and their Hereafter - and if they lack them, they will be in severe distress: a knowledgeable and pious scholar, a good and obeyed ruler, and a trustworthy and experienced physician. Tuḥaf al-‘Uqūl