Hawzah News Agency – Imam Ali (AS), in his will to his son al-Hasan (AS), said:

يا بُنَيَّ، إيّاكَ ومُصادَقَةَ الأحمَقِ؛ فإنّهُ يُرِيدُ أن يَنفَعَكَ فَيَضُرُّك.

 ‘O my son, beware of befriending a stupid person, for although he will surely want to be of benefit to you, he will only bring you trouble.’

Source: Bihar al-Anwar, v. 74, p. 198, no. 35