Musnad Ahmad 2:181

Abu Nu'aym narrated to us, Malik—meaning Ibn Mighwal—narrated to us, he said: I heard al-Fudayl ibn 'Amr, from Ibrahim, from 'Umar, who said: I asked the Messenger of Allah, may Allah bless him and grant him peace, about the *kalalah* (the person who leaves behind neither descendants nor ascendants as heirs). He said: "The summer verse is sufficient for you." He ('Umar) said: That I had asked the Messenger of Allah, may Allah bless him and grant him peace, about it is more beloved to me than having red camels.