Imru' al-Qais
Some stories tell that Imru' al-Qais was in his father's army fighting the tribe of Asad when his father was slain, but this is not agreed by all the biographers. The most popular story comes to us from ibn al-Kalbi (d. 826 AD). Ibn al-Kalbi holds that Imru' al-Qais was still in exile at the time of his father's death, and that the news reached him while he was in the midst of a party with his friends. Upon hearing the news, he said "May God be merciful to my father. He let me stray when I was small, and now that I am grown he has burdened me with his blood. There will be no alertness today, and no drunkenness tomorrow," followed by perhaps his most famous quote: "Today is for drink, and tomorrow for serious matters."