Narrated Ibn 'Abbas:
that the Messenger of Allah (ﷺ) said: "Whoever says (something) about the Qur'an without knowledge, then let him take his seat in the Fire." (ES)
English reference (ES): Vol. 5, Book 44, Hadith 2950 (ES)
Arabic reference (ES): Book 47, Hadith 3204 (ES)