Abdullah Ibn Mas’ud (رضي الله عنه) said, A memoriser of the Qur'an should be known for -his long night prayers when people are asleep, -his fasting when people are eating, -his sadness when people are happy, -his silence when people are talking nonsense, and -his humbleness when people are not. He should be wise, gentle and not talk too much; -he should not be rude, negligent, clamorous, nor hot tempered.“ [Sifaat As-Safwa 1/413]