Khalid ibn Kaysan said, "I was with Ibn 'Umar when Iyyas ibn Khaythama
got up and said to him, 'Shall I recite some poetry, Ibn al-Faruq?' 'Yes,'
he replied, 'but only recite good poetry to me.'" He recited until he came
to something which Ibn 'Umar disliked whereupon he told him to stop.