Imam Sadiq (a.s) said: “One day when the Prophet of God (a.s) saw Harith ibn Malik ibn al-Naemane al-Ansarie, he asked him: “O' Harith! How did you spent the night until the morning?” Harith replied: “O' Prophet of God! I spent the night until the morning as a true believer.” The Prophet (a.s) said: “There is a certain truth to all faith. What is the truth of your faith?” He replied: “I abstained from worldly affairs, stayed up all night long, and fasted all day. Then when I looked up to my Lord's heavens, it was as if the Judgment Day had approached, and I joined the residents of Heaven while they were going to visit each other, and the residents of Hell were being tortured.” God's Prophet (a.s) said: “You are a believer. God has enlightened your heart with faith. Then remain steadfast, and may God make you steadfast.” Then Harith said: “O' Prophet of God! I fear none of my parts (to sin) but my eyes.” So the Prophet of God (a.s) prayed for him and he lost his sight.”