Musnad Ahmad 26:430

Yahya ibn Adam narrated to us, Waki’ narrated to us, from his father, from Abu Ishaq, from Ma’di Karib, who said: We came to Abdullah and asked him to recite to us: "Ta-Sin-Mim" of the two hundred. He said: "It is not with me, but upon you is the one who took it from the Messenger of Allah, may Allah bless him and grant him peace: Khabbab ibn al-Aratt." He said: So we came to Khabbab ibn al-Aratt, and he recited it to us.