ENOfficial
Ibn 'Umar reported that the Prophet, may Allah bless him and grant him peace, said, "It is better for one of you to fill his belly with pus than to fill it with poetry."
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا عُبَيْدُ اللهِ بْنُ مُوسَى، قَالَ: أَخْبَرَنَا حَنْظَلَةُ، عَنْ سَالِمٍ، عَنِ ابْنِ عُمَرَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ: لأَنْ يَمْتَلِئَ جَوْفُ أَحَدِكُمْ قَيْحًا خَيْرٌ لَهُ مِنْ أَنْ يَمْتَلِئَ شِعْرًا.
sunnah.com