Allah's Messenger (ﷺ); said, "It is better for anyone of you that the inside of his body be filled with pus which may consume his body, than it be filled with poetry."
Sahih al-Bukhari Book 78, Hadith 181
← Previous Hadith The Prophet (ﷺ) said, "It is better for a man to fill the inside of his body with pus than to fill it with poetry."

Sahih al-Bukhari Book 78, Hadith 180 Next Hadith → Allah, the brother of Abu Al-Qu'ais asked my permission to enter after the verses of Al-Hijab (veiling the ladies) was revealed, and I said, "By Allah, I will not admit him unless I take permission of Allah's Apostle for it was not the brother of Al-Qu'ais who had suckled me, but it was the wife of Al-Qu'ais, who had suckled me." Then Allah's Messenger (ﷺ) entered upon me, and I said, "O Allah's Messenger (ﷺ)! The man has not nursed me but his wife has nursed me." He said, "Admit him because he is your uncle (not from blood relation, but because you have been nursed by his wife), Taribat Yaminuki." `Urwa said, "Because of this reason, ' Aisha used to say: Foster suckling relations render all those things (marriages etc.) illegal which are illegal because of the corresponding blood relations." (See Hadith No. 36, Vol. 7)

Sahih al-Bukhari Book 78, Hadith 182