The Holy Prophet [s] said: "If your rulers are the good doers of you, rich ones are from the gracious ones of you, and your affairs go on through consultation among you, then (living) on the earth is better for you than (being) under it. But, if your rulers are the wicked ones of you, your rich ones from the misers of you, and your affairs go on without consultation among you, then (being) under the ground is better for you than (living) on it."
Manhaj-us-Sadiqeen, commentary, vol. 2, p. 373
Imam Amir ul Mu'mineen Ali [a] said: "He who consults with the wise, seeks for the lights of intelligence to be enlightened with", (and will recognize right from wrong).
Ghurar-ul-Hikam, p. 336
Imam Amir ul Mu'mineen Ali [a] said: "He who consults with men of understanding, shows his development...."
Bihar-ul-Anwar, vol. 75, p. 105
The Holy Prophet [s] said: "No believer will become wretched by consultation, and none will gain merit through stubbornness."
Nahj-ul-Fisahah, p. 533