Imam Sufyan ibn ‘Uyaynah {May Allah have mercy upon him} said:
“The most knowledgeable with regards to Fatwa are the most silent of them; and the most ignorant with respect to Fatwa are the most outspoken of them.”
He also said: “The most daring of the people to issue verdicts are the least of them in knowledge.”
{Jami’ Bayan al-‘Ilm wa Fadlihi, Volume 2 pg. 816}