Mishkat al-Masabih

Abu Huraira reported God’s Messenger as saying, “There are seven whom God will cover with His shade on the day when there will be no shade but His:a just imam; a young man who grows up worshipping God; a man whose heart is attached to the mosque from the time he leaves it till he returns to it; two men who love one another for God's sake, meeting thus and separating thus; a man who remembers God in solitude, his eyes pouring forth tears; a man who, when accosted by a woman of rank and beauty, says, ‘I fear God’; and a man who gives alms concealing it so that his left hand does not know what his right hand bestows.” (Bukhari and Muslim.)