Yahya related to me from Malik that Yahya ibn Said said, "I haveheard that by his good character a man can reach the degree of the onewho stands in prayer at night and the one who is thirsty from fastingin the heat of the day." (FR)
USC-MSA web (English) reference: Book 47, Hadith 6 (FR)
Arabic reference (FR): Book 47, Hadith 1641 (FR)