Hadith 2654
´Narrated Ibn Ka'b bin Malik:` from his father that he heard the Messenger of Allah (ﷺ) saying: "Whoever seeks knowledge to contend with the scholars, or to use it to argue with the fools, and to have people's faces turn towards him, then he shall be admitted to the Fire."
Hadith 2933
´Narrated Ibn 'Abbas:` from 'Ubayy bin Ka'b, that the Prophet (ﷺ) would recite: "Qad Balaghta Min Ladunni 'Udhra" (18:76) with heaviness (Muthaqqalah - meaning with Tashdid on the Nun in "Ladunni")."