Musannaf Ibn Abi Shaybah 32091 — Those who disliked saying

Nafi' said: Sayyiduna Ibn Umar (may Allah be pleased with them both) used to dislike calling surahs of the Qur'an "Mufassal", and he would say: "The entire Qur'an is detailed and clear. Rather, say: the short surahs of the Qur'an."