Musnad Ahmad 658:122

Yahya ibn Adam narrated to us, Abu Bakr narrated to us, from Abu Ishaq, from al-Bara’ ibn ‘Azib, who said: A man came to the Messenger of Allah, may Allah bless him and grant him peace, and asked him about the *kalalah* (inheritance of one who leaves behind neither ascendants nor descendants). He said: "The summer verse is sufficient for you."