With the Hadith
The Sin of Speaking About Allah Without Knowledge
Az-Zuhri narrated from Amr bin Shu'aib from his father from his grandfather who said: The Prophet, peace and blessings be upon him, heard people disputing and said, "Those before you were destroyed by this; they compared parts of the Book of Allah with other parts. The Book of Allah was revealed to confirm each other, so do not deny some parts with others. Say what you know of it, and leave what you do not know to its scholar." Narrated by Ahmad in his Musnad.
Ayyub narrated from Ibn Bulaika who said: Abu Bakr As-Siddiq, may Allah be pleased with him, was asked about a verse and said: "Which land would carry me, and which sky would cover me? Where would I go? And what should I do if I say about the Book of Allah other than what Allah intended?"
It is authentic from Ibn Masoud and Ibn Abbas: "Whoever gives verdicts to people in everything they ask is insane."
Al-Shafi'i, may Allah have mercy on him, said: "I heard Malik say: I heard Ibn Ajlan say: If the scholar neglects 'I do not know,' his vital parts are afflicted." Ibn Ajlan mentioned it from Ibn Abbas.
Abu Husain Al-Asadi said: "One of them gives a verdict on an issue that, if it came to Omar, he would gather the people of Badr for it."
From Ibn Masoud: "Whoever has knowledge, let him speak with it, and whoever does not have knowledge, let him say: 'Allah knows best,' for Allah said to His Prophet: {Say, "I do not ask you for it any payment, nor am I of those who pretend."}
If this was the saying of the righteous predecessors of the Ummah, from the Companions and the Tabi'een, who were the best generations in terms of knowledge, action, and piety, then what do the scholars of this time say, those who dare to speak about the religion of Allah and give verdicts to the people other than what Allah intended? Why do they rush into the fire, seeking the vanities of this world, pleasing their rulers and displeasing their Lord, misleading people? Those are the scholars of the rulers, about whom our noble Messenger, peace and blessings be upon him, said: "If you see scholars at the doors of rulers, then fear for your religion from them."