[pinkpanther]

Musnad Ibn Ahmad (21236)

عن عتي: إذا الرجل تعزى بعزاء الجاهلية، فأعضوه بهن أبيه، ولا تكنوا

Narrated by Atyi:

"When a man claims (or boasts about) a pre-Islamic affiliation , make him (or tell him to) bite his father's p_nis, and don't use allegory! (Be explicit)"

Again in actually readable English:

"When someone displays pride about his pre-islamic times, tell him to suck his father's di*k. And don't hold back in your insulting language!"

The Hadith (and some other versions) is sahih according to Albani and Ibn Hibban.