«إذا رأيتم الرجل يتعزى بعزاء الجاهلية، فأعضوه بهن أبيه ولا تكنوا»
The Prophet (peace and blessings be upon him) said:
"When you see a man boasting in the manner of the Days of Ignorance (and calling out by the names of his forefathers), tell him in plain words to bite his father's private part, and do not use any allusion or veiled words in this."
Hadith Referenceصحیح الجامع الصغیر / حرف الألف / 567