Musannaf Ibn Abi Shayba 16:612

Abu Bakr narrated to us, he said: Yazid narrated to us, he said: Isma'il informed us, from Shu'ayb ibn Yasar: He said: They mentioned the trailing of the qamis (shirt) and the izar (lower garment) in the presence of 'Ikrimah. He said: "It is, by Allah, evil and more evil."